Pub Date : 2024-08-30DOI: 10.1016/j.adt.2024.101684
V.Yu. Denisov
The same alpha-nucleus interaction describes the alpha-decay and alpha-capture reactions in the Unified Model for Alpha-Decay and Alpha-Capture (UMADAC). The data for the ground-state-to-ground-state alpha-transition half-lives in 420 nuclei, the half-lives for alpha-transition from the ground state to the first excited state in 74 even–even nuclei, and the alpha-capture cross sections of 20 spherical and deformed nuclei are used for defining the parameters of the UMADAC. The pointed data are well described in the framework of the UMADAC utilizing the obtained parameters. The ground-state-to-ground-state alpha-transition half-lives in 3802 nuclei with the proton and nucleon numbers in the ranges 50 126 and 97 340 are calculated in the UMADAC and presented in the Table 1. The quadrupole and hexadecapole deformations of the daughter nucleus are considered in the UMADAC. The minimal values of the orbital momenta of the alpha-transition between the ground states are found using available experimental and theoretical data for the ground state spin and parity values of nuclei. The half-lives for 223 alpha-transitions from the ground-state of the parent even–even nuclei to the lowest state of the daughter nuclei with the proton and nucleon numbers in the ranges 52 102 and 108 254 are obtained in the UMADAC and given in the Table 2.
{"title":"Alpha-decay half-lives and alpha-capture cross-sections","authors":"V.Yu. Denisov","doi":"10.1016/j.adt.2024.101684","DOIUrl":"10.1016/j.adt.2024.101684","url":null,"abstract":"<div><div>The same alpha-nucleus interaction describes the alpha-decay and alpha-capture reactions in the Unified Model for Alpha-Decay and Alpha-Capture (UMADAC). The data for the ground-state-to-ground-state alpha-transition half-lives in 420 nuclei, the half-lives for alpha-transition from the ground state to the first excited <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo></mrow></msup></math></span> state in 74 even–even nuclei, and the alpha-capture cross sections of 20 spherical and deformed nuclei are used for defining the parameters of the UMADAC. The pointed data are well described in the framework of the UMADAC utilizing the obtained parameters. The ground-state-to-ground-state alpha-transition half-lives in 3802 nuclei with the proton <span><math><mi>Z</mi></math></span> and nucleon <span><math><mi>A</mi></math></span> numbers in the ranges 50 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 126 and 97 <span><math><mrow><mo>≤</mo><mi>A</mi><mo>≤</mo></mrow></math></span> 340 are calculated in the UMADAC and presented in the <span><span>Table 1</span></span>. The quadrupole and hexadecapole deformations of the daughter nucleus are considered in the UMADAC. The minimal values of the orbital momenta of the alpha-transition between the ground states are found using available experimental and theoretical data for the ground state spin and parity values of nuclei. The half-lives for 223 alpha-transitions from the ground-state of the parent even–even nuclei to the lowest <span><math><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo></mrow></msup></math></span> state of the daughter nuclei with the proton <span><math><mi>Z</mi></math></span> and nucleon <span><math><mi>A</mi></math></span> numbers in the ranges 52 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 102 and 108 <span><math><mrow><mo>≤</mo><mi>A</mi><mo>≤</mo></mrow></math></span> 254 are obtained in the UMADAC and given in the <span><span>Table 2</span></span>.</div></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"161 ","pages":"Article 101684"},"PeriodicalIF":2.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-17DOI: 10.1016/j.adt.2024.101683
M. Klempka , J. Ruczkowski , M. Elantkowska
The values of the radiative parameters for atomic cobalt were determined using a semi-empirical method. The eigenvector amplitudes determined in our previously published research were adopted. In most cases, the calculated values of the oscillator strengths and radiative lifetimes agree well with the experimental data. Predictions of the values of the radiative parameters are also provided.
{"title":"Semi-empirical determination of radiative parameters for atomic cobalt","authors":"M. Klempka , J. Ruczkowski , M. Elantkowska","doi":"10.1016/j.adt.2024.101683","DOIUrl":"10.1016/j.adt.2024.101683","url":null,"abstract":"<div><p>The values of the radiative parameters for atomic cobalt were determined using a semi-empirical method. The eigenvector amplitudes determined in our previously published research were adopted. In most cases, the calculated values of the oscillator strengths and radiative lifetimes agree well with the experimental data. Predictions of the values of the radiative parameters are also provided.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"160 ","pages":"Article 101683"},"PeriodicalIF":2.7,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-05DOI: 10.1016/j.adt.2024.101682
N. Nica
<div><p>We revisit the principles underlying high-spin level schemes, using the case of <sup>171</sup>Yb as an example. We first introduce the least-squares fit of the experimental <span><math><mi>γ</mi></math></span>-ray energy bands vs spin as a family of straight lines, <span><math><mrow><mn>2</mn><mi>c</mi><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span>. The fit captures the average rotational phenomenology of all the bands. The constant <span><math><mrow><mn>2</mn><mi>c</mi></mrow></math></span> average slope is the inverse of the effective moment of inertia <span><math><mrow><msubsup><mrow><mi>ℑ</mi></mrow><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></msubsup><mo>=</mo><msup><mrow><mo>ħ</mo></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mn>2</mn><mi>c</mi></mrow></math></span>. The inclusion of the additional integer parameter <span><math><mi>k</mi></math></span> transforms the Bohr–Mottelson ideal rotor into a double helix structure that can accommodate all combinations of spin, parity, and signature quantum numbers for the rotational levels. Finally, the experimental <span><math><mi>γ</mi></math></span>-ray energies can be parametrized as <span><math><mrow><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>+</mo><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span>, where the additional integer <span><math><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> contains the deviations of <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>γ</mi></mrow></msub></math></span> values from the fit lines and <span><math><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub></math></span> is the band inertial parameter, which determines the band moments of inertia, <span><math><mrow><msubsup><mrow><mi>ℑ</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow><mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></msubsup><mo>=</mo><msup><mrow><mo>ħ</mo></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub></mrow></math></span>. The new <span><math><mrow><msub><mrow><mi>E</mi></mrow><mrow><mi>γ</mi></mrow></msub><mo>=</mo><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>+</mo><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span> parametrization leads to a natural <span><math><mrow><mn>3</mn><mi>D</mi></mrow></math></span> representation of the <sup>171</sup>Yb rotational bands as paths on the double helix structure. These paths contain
{"title":"Double helix level scheme of 171Yb nucleus","authors":"N. Nica","doi":"10.1016/j.adt.2024.101682","DOIUrl":"10.1016/j.adt.2024.101682","url":null,"abstract":"<div><p>We revisit the principles underlying high-spin level schemes, using the case of <sup>171</sup>Yb as an example. We first introduce the least-squares fit of the experimental <span><math><mi>γ</mi></math></span>-ray energy bands vs spin as a family of straight lines, <span><math><mrow><mn>2</mn><mi>c</mi><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span>. The fit captures the average rotational phenomenology of all the bands. The constant <span><math><mrow><mn>2</mn><mi>c</mi></mrow></math></span> average slope is the inverse of the effective moment of inertia <span><math><mrow><msubsup><mrow><mi>ℑ</mi></mrow><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></msubsup><mo>=</mo><msup><mrow><mo>ħ</mo></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mn>2</mn><mi>c</mi></mrow></math></span>. The inclusion of the additional integer parameter <span><math><mi>k</mi></math></span> transforms the Bohr–Mottelson ideal rotor into a double helix structure that can accommodate all combinations of spin, parity, and signature quantum numbers for the rotational levels. Finally, the experimental <span><math><mi>γ</mi></math></span>-ray energies can be parametrized as <span><math><mrow><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>+</mo><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span>, where the additional integer <span><math><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> contains the deviations of <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>γ</mi></mrow></msub></math></span> values from the fit lines and <span><math><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub></math></span> is the band inertial parameter, which determines the band moments of inertia, <span><math><mrow><msubsup><mrow><mi>ℑ</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow><mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></msubsup><mo>=</mo><msup><mrow><mo>ħ</mo></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub></mrow></math></span>. The new <span><math><mrow><msub><mrow><mi>E</mi></mrow><mrow><mi>γ</mi></mrow></msub><mo>=</mo><mn>2</mn><msub><mrow><mi>c</mi></mrow><mrow><mi>b</mi><mi>a</mi><mi>n</mi><mi>d</mi></mrow></msub><mrow><mo>(</mo><mn>2</mn><mi>I</mi><mo>+</mo><mi>k</mi><mo>+</mo><msup><mrow><mi>k</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>−</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span> parametrization leads to a natural <span><math><mrow><mn>3</mn><mi>D</mi></mrow></math></span> representation of the <sup>171</sup>Yb rotational bands as paths on the double helix structure. These paths contain","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"160 ","pages":"Article 101682"},"PeriodicalIF":2.7,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Production of the Co nuclei on Ni in photonuclear reactions using bremsstrahlung gamma photon irradiation with end-point energy between 35 and 94 MeV has been studied. The experiment was performed at the electron linear accelerator LUE-40 NSC KIPT using the methods of activation and off-line -ray spectroscopy. The obtained experimental flux-averaged cross-sections agree with the data found in the literature. The theoretical flux-averaged cross-sections for the production of Co and Ni were estimated using the cross-section values from the TALYS1.95 code and bremsstrahlung spectra of gamma photons calculated by GEANT4.9.2. The experimental results for Co agree with the cumulative . For the reactions with the production of Co nuclei, the theoretical values differ from experimental ones.
{"title":"Photoproduction of the 55−57Co nuclei on natNi at the bremsstrahlung end-point energy of 35–94 MeV","authors":"I.S. Timchenko , O.S. Deiev , S.M. Olejnik , S.M. Potin , V.A. Kushnir , V.V. Mytrochenko , S.A. Perezhogin , A. Herzáň","doi":"10.1016/j.adt.2024.101674","DOIUrl":"10.1016/j.adt.2024.101674","url":null,"abstract":"<div><p>Production of the <span><math><msup><mrow></mrow><mrow><mn>55</mn><mo>−</mo><mn>57</mn></mrow></msup></math></span>Co nuclei on <span><math><msup><mrow></mrow><mrow><mi>nat</mi></mrow></msup></math></span>Ni in photonuclear reactions using bremsstrahlung gamma photon irradiation with end-point energy <span><math><msub><mrow><mi>E</mi></mrow><mrow><mstyle><mstyle><mi>γ</mi></mstyle></mstyle><mi>max</mi></mrow></msub></math></span> between 35 and 94 MeV has been studied. The experiment was performed at the electron linear accelerator LUE-40 NSC KIPT using the methods of <span><math><mi>γ</mi></math></span> activation and off-line <span><math><mi>γ</mi></math></span>-ray spectroscopy. The obtained experimental flux-averaged cross-sections <span><math><mrow><mo>〈</mo><mi>σ</mi><mrow><mo>(</mo><msub><mrow><mi>E</mi></mrow><mrow><mstyle><mstyle><mi>γ</mi></mstyle></mstyle><mi>max</mi></mrow></msub><mo>)</mo></mrow><mo>〉</mo></mrow></math></span> agree with the data found in the literature. The theoretical flux-averaged cross-sections <span><math><msub><mrow><mrow><mo>〈</mo><mi>σ</mi><mrow><mo>(</mo><msub><mrow><mi>E</mi></mrow><mrow><mstyle><mstyle><mi>γ</mi></mstyle></mstyle><mi>max</mi></mrow></msub><mo>)</mo></mrow><mo>〉</mo></mrow></mrow><mrow><mi>th</mi></mrow></msub></math></span> for the production of <span><math><msup><mrow></mrow><mrow><mn>55</mn><mo>−</mo><mn>57</mn></mrow></msup></math></span>Co and <span><math><msup><mrow></mrow><mrow><mn>55</mn><mo>−</mo><mn>57</mn></mrow></msup></math></span>Ni were estimated using the cross-section values <span><math><mrow><mi>σ</mi><mrow><mo>(</mo><mi>E</mi><mo>)</mo></mrow></mrow></math></span> from the TALYS1.95 code and bremsstrahlung spectra of gamma photons calculated by GEANT4.9.2. The experimental results for <span><math><msup><mrow></mrow><mrow><mn>56</mn><mo>,</mo><mn>57</mn></mrow></msup></math></span>Co agree with the cumulative <span><math><msub><mrow><mrow><mo>〈</mo><mi>σ</mi><mrow><mo>(</mo><msub><mrow><mi>E</mi></mrow><mrow><mstyle><mstyle><mi>γ</mi></mstyle></mstyle><mi>max</mi></mrow></msub><mo>)</mo></mrow><mo>〉</mo></mrow></mrow><mrow><mi>th</mi></mrow></msub></math></span>. For the reactions with the production of <span><math><msup><mrow></mrow><mrow><mn>55</mn></mrow></msup></math></span>Co nuclei, the theoretical values differ from experimental ones.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"160 ","pages":"Article 101674"},"PeriodicalIF":2.7,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-14DOI: 10.1016/j.adt.2024.101673
F.F. Goryaev , I.I. Tupitsyn
We present the results of calculations for the total energies, ionization energies, and one-electron binding energies for ground-state configurations of neodymium ions Nd I to Nd. These calculations are based on the Dirac–Fock approximation taking the Breit and quantum electrodynamics corrections into account. The configuration interaction method, taking into account all relativistic configurations corresponding to the non-relativistic one, is used to obtain total energies and wave functions in the intermediate coupling scheme. Comparison is given with other available data.
我们介绍了钕离子 Nd I 至 Nd59+ 基态构型的总能量、电离能和单电子结合能的计算结果。这些计算基于狄拉克-福克近似，并考虑了布雷特和量子电动力学修正。在中间耦合方案中，采用了构型相互作用方法，考虑了与非相对论构型相对应的所有相对论构型，从而获得了总能量和波函数。并与其他可用数据进行了比较。
{"title":"Relativistic calculations for total energies, ionization energies, and one-electron binding energies for Neodymium ions Nd I to Nd59+","authors":"F.F. Goryaev , I.I. Tupitsyn","doi":"10.1016/j.adt.2024.101673","DOIUrl":"10.1016/j.adt.2024.101673","url":null,"abstract":"<div><p><span>We present the results of calculations for the total energies, ionization energies, and one-electron binding energies for ground-state configurations of neodymium ions Nd I to Nd</span><span><math><msup><mrow></mrow><mrow><mn>59</mn><mo>+</mo></mrow></msup></math></span><span>. These calculations are based on the Dirac–Fock approximation taking the Breit and quantum electrodynamics corrections into account. The configuration interaction method, taking into account all relativistic configurations corresponding to the non-relativistic one, is used to obtain total energies and wave functions in the intermediate coupling scheme. Comparison is given with other available data.</span></p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"160 ","pages":"Article 101673"},"PeriodicalIF":2.7,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141706288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-03DOI: 10.1016/j.adt.2024.101672
S. Bofos , T.J. Mertzimekis
The nuclear magnetic octupole moment is revisited as a potentially useful observable for nuclear structure studies. The magnetic octupole moment, , is examined in terms of the nuclear collective model including weak and strong coupling. Single-particle formulation is additionally considered in the overall comparison of theoretical predictions with available experimental data. Mirror nuclei symmetry is examined in terms of the magnetic octupole moment isoscalar and isovector terms. A full list of predictions for of odd–proton and odd–neutron nuclei in medium–heavy mass regimes of the nuclear chart is produced aiming at providing starting values for future experimental endeavors.
{"title":"Revisiting the nuclear magnetic octupole moment","authors":"S. Bofos , T.J. Mertzimekis","doi":"10.1016/j.adt.2024.101672","DOIUrl":"10.1016/j.adt.2024.101672","url":null,"abstract":"<div><p>The nuclear magnetic octupole moment is revisited as a potentially useful observable for nuclear structure studies. The magnetic octupole moment, <span><math><mi>Ω</mi></math></span>, is examined in terms of the nuclear collective model including weak and strong coupling. Single-particle formulation is additionally considered in the overall comparison of theoretical predictions with available experimental data. Mirror nuclei symmetry is examined in terms of the magnetic octupole moment isoscalar and isovector terms. A full list of predictions for <span><math><mi>Ω</mi></math></span> of odd–proton and odd–neutron nuclei in medium–heavy mass regimes of the nuclear chart is produced aiming at providing starting values for future experimental endeavors.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"159 ","pages":"Article 101672"},"PeriodicalIF":2.7,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-29DOI: 10.1016/j.adt.2024.101664
L. Windholz , S. Kröger
Using wave number calibrated Fourier transform spectra, ranging from the IR to the UV regions, we determined with high accuracy the energies of the levels of the first ion of Niobium. In order to increase the accuracy of the center of gravity wave numbers of the observed spectral lines, the hyperfine structure was taken into account. For this purpose, the magnetic dipole hyperfine constants were determined for all involved levels. All but one of the previously known levels were included in the calculation. This level (at 91 493 cm−1) is considered to be non-existent. From the experimental center of gravity wave numbers of 1121 lines we deduced the energy values of 184 levels of even parity and 164 levels of odd parity in a global fit. A comparison between our results and all previously available literature values is provided.
{"title":"Revised energy levels and hyperfine structure constants of Nb II","authors":"L. Windholz , S. Kröger","doi":"10.1016/j.adt.2024.101664","DOIUrl":"10.1016/j.adt.2024.101664","url":null,"abstract":"<div><p>Using wave number calibrated Fourier transform spectra, ranging from the IR to the UV regions, we determined with high accuracy the energies of the levels of the first ion of Niobium. In order to increase the accuracy of the center of gravity wave numbers of the observed spectral lines, the hyperfine structure was taken into account. For this purpose, the magnetic dipole hyperfine constants <span><math><mi>A</mi></math></span> were determined for all involved levels. All but one of the previously known levels were included in the calculation. This level (at 91<!--> <!-->493 cm<sup>−1</sup>) is considered to be non-existent. From the experimental center of gravity wave numbers of 1121 lines we deduced the energy values of 184 levels of even parity and 164 levels of odd parity in a global fit. A comparison between our results and all previously available literature values is provided.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"159 ","pages":"Article 101664"},"PeriodicalIF":2.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0092640X24000299/pdfft?md5=2e9a022e9b91a19797c9ff2996b8b830&pid=1-s2.0-S0092640X24000299-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-15DOI: 10.1016/j.adt.2024.101662
<div><p>The main purpose of this paper is to collect from various sources over 3300 experimental values of K-shell fluorescence cross sections (<span><math><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mrow><mn>1</mn><mo>,</mo><mn>3</mn></mrow></msub></msub></msub></math></span><em>,</em><span><math><mrow><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mrow><mn>2</mn><mo>,</mo><mn>4</mn></mrow></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>α</mi><mn>1</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>α</mi><mn>2</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mn>1</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mn>2</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>1</mn></msub></msub></msub><mo>,</mo><mspace></mspace><msub><mi>σ</mi><msub><mi>K</mi><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>2</mn></msub></msub></msub><mo>,</mo><mspace></mspace><msub><mi>σ</mi><msub><mi>K</mi><mi>α</mi></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>β</mi></msub></msub></mrow></math></span> and <span><math><msub><mi>σ</mi><msub><mi>K</mi><mrow><mi>t</mi><mi>o</mi><mi>t</mi></mrow></msub></msub></math></span>) of elements with atomic number in the range <span><math><mrow><mn>16</mn><mspace></mspace><mo>≤</mo><mspace></mspace><mi>Z</mi><mspace></mspace><mo>≤</mo><mspace></mspace><mn>92</mn><mspace></mspace></mrow></math></span>by photo-ionization in multiple excitation energy ranging from 5.46 to 661.6 keV, which are presented in a form of 11 tables. The experimental values reported in 96 papers by numerous researches were published between 1985 and 2023. Therefore, by considering in the same tables a calculation of weighted average fluorescence cross section <span><math><mrow><mrow><mo>(</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>j</mi></msub></msub><mo>)</mo></mrow><msub><mspace></mspace><mi>W</mi></msub></mrow></math></span>, with <span><math><mrow><mo>(</mo><mrow><mi>j</mi><mo>=</mo><msub><mi>β</mi><mrow><mn>1</mn><mo>,</mo><mn>3</mn></mrow></msub><mo>,</mo><msub><mi>β</mi><mrow><mn>2</mn><mo>,</mo><mn>4</mn></mrow></msub><mo>,</mo><msub><mi>α</mi><mn>1</mn></msub><mo>,</mo><msub><mi>α</mi><mn>2</mn></msub><mo>,</mo><msub><mi>β</mi><mn>1</mn></msub><mo>,</mo><msub><mi>β</mi><mn>2</mn></msub><mo>,</mo><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>1</mn></msub><mo>,</mo><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>2</mn></msub><mo>,</mo><mspace></mspace><mi>α</mi><mo>,</mo><mi>β</mi><mspace></mspace><mrow><mtext>and</mtext><mspace></mspace><mtext>tot</mtext></mrow></mrow><mo>)</mo></mrow></math></span> for each element; a full study of these data is carried out. However, dividing the measured values <span><math><mrow><msub><mrow><mo>(</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>j</mi></msub></msub><mo>)</mo></mrow><mrow><mi>E<
{"title":"Experimental K-shell fluorescence cross sections for elements in the atomic number range 16 ≤ Z ≤ 92 by photon impact at various energies","authors":"","doi":"10.1016/j.adt.2024.101662","DOIUrl":"10.1016/j.adt.2024.101662","url":null,"abstract":"<div><p>The main purpose of this paper is to collect from various sources over 3300 experimental values of K-shell fluorescence cross sections (<span><math><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mrow><mn>1</mn><mo>,</mo><mn>3</mn></mrow></msub></msub></msub></math></span><em>,</em><span><math><mrow><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mrow><mn>2</mn><mo>,</mo><mn>4</mn></mrow></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>α</mi><mn>1</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>α</mi><mn>2</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mn>1</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mi>β</mi><mn>2</mn></msub></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>1</mn></msub></msub></msub><mo>,</mo><mspace></mspace><msub><mi>σ</mi><msub><mi>K</mi><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>2</mn></msub></msub></msub><mo>,</mo><mspace></mspace><msub><mi>σ</mi><msub><mi>K</mi><mi>α</mi></msub></msub><mo>,</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>β</mi></msub></msub></mrow></math></span> and <span><math><msub><mi>σ</mi><msub><mi>K</mi><mrow><mi>t</mi><mi>o</mi><mi>t</mi></mrow></msub></msub></math></span>) of elements with atomic number in the range <span><math><mrow><mn>16</mn><mspace></mspace><mo>≤</mo><mspace></mspace><mi>Z</mi><mspace></mspace><mo>≤</mo><mspace></mspace><mn>92</mn><mspace></mspace></mrow></math></span>by photo-ionization in multiple excitation energy ranging from 5.46 to 661.6 keV, which are presented in a form of 11 tables. The experimental values reported in 96 papers by numerous researches were published between 1985 and 2023. Therefore, by considering in the same tables a calculation of weighted average fluorescence cross section <span><math><mrow><mrow><mo>(</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>j</mi></msub></msub><mo>)</mo></mrow><msub><mspace></mspace><mi>W</mi></msub></mrow></math></span>, with <span><math><mrow><mo>(</mo><mrow><mi>j</mi><mo>=</mo><msub><mi>β</mi><mrow><mn>1</mn><mo>,</mo><mn>3</mn></mrow></msub><mo>,</mo><msub><mi>β</mi><mrow><mn>2</mn><mo>,</mo><mn>4</mn></mrow></msub><mo>,</mo><msub><mi>α</mi><mn>1</mn></msub><mo>,</mo><msub><mi>α</mi><mn>2</mn></msub><mo>,</mo><msub><mi>β</mi><mn>1</mn></msub><mo>,</mo><msub><mi>β</mi><mn>2</mn></msub><mo>,</mo><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>1</mn></msub><mo>,</mo><msub><mrow><msup><mi>β</mi><mo>′</mo></msup></mrow><mn>2</mn></msub><mo>,</mo><mspace></mspace><mi>α</mi><mo>,</mo><mi>β</mi><mspace></mspace><mrow><mtext>and</mtext><mspace></mspace><mtext>tot</mtext></mrow></mrow><mo>)</mo></mrow></math></span> for each element; a full study of these data is carried out. However, dividing the measured values <span><math><mrow><msub><mrow><mo>(</mo><msub><mi>σ</mi><msub><mi>K</mi><mi>j</mi></msub></msub><mo>)</mo></mrow><mrow><mi>E<","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"159 ","pages":"Article 101662"},"PeriodicalIF":2.7,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141389603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-08DOI: 10.1016/j.adt.2024.101663
Argon is being considered as an injected impurity to mitigate damage to divertors of DEMO caused by excessive heat flux. For a comprehensive understanding of Ar plasma, carefully evaluated atomic data are required. In this study, the electron-impact ionization cross-sections and rate coefficients for all atomic ions in the argon isonuclear sequence are calculated using the level-to-level distorted wave approximation. The calculated cross-sections and rate coefficients are compared with experimental data and other theoretical calculations. The calculated values are consistent with results reported in the literature, with differences not exceeding 20%. We fit the calculated cross-sections using an empirical formula. Additionally, we combine our ionization rate coefficients with the dielectronic- and radiative-recombination rate coefficients from other studies to determine the ionization balance. The obtained data are expected to be useful for plasma modelling involving argon impurities.
{"title":"Benchmark calculation of electron-impact ionization cross sections and rate coefficients of atomic ions in Ar isonuclear sequence","authors":"","doi":"10.1016/j.adt.2024.101663","DOIUrl":"10.1016/j.adt.2024.101663","url":null,"abstract":"<div><p>Argon is being considered as an injected impurity to mitigate damage to divertors of DEMO caused by excessive heat flux. For a comprehensive understanding of Ar plasma, carefully evaluated atomic data are required. In this study, the electron-impact ionization cross-sections and rate coefficients for all atomic ions in the argon isonuclear sequence are calculated using the level-to-level distorted wave approximation. The calculated cross-sections and rate coefficients are compared with experimental data and other theoretical calculations. The calculated values are consistent with results reported in the literature, with differences not exceeding 20%. We fit the calculated cross-sections using an empirical formula. Additionally, we combine our ionization rate coefficients with the dielectronic- and radiative-recombination rate coefficients from other studies to determine the ionization balance. The obtained data are expected to be useful for plasma modelling involving argon impurities.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"159 ","pages":"Article 101663"},"PeriodicalIF":2.7,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141408579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-17DOI: 10.1016/j.adt.2024.101661
Peng Guo , Xiaojie Cao , Kangmin Chen , Zhihui Chen , Myung-Ki Cheoun , Yong-Beom Choi , Pak Chung Lam , Wenmin Deng , Jianmin Dong , Pengxiang Du , Xiaokai Du , Kangda Duan , Xiaohua Fan , Wei Gao , Lisheng Geng , Eunja Ha , Xiao-Tao He , Jinniu Hu , Jingke Huang , Kun Huang , Lianjian Zou
The mass table in the deformed relativistic Hartree–Bogoliubov theory in continuum (DRHBc) with the PC-PK1 density functional has been established for even- nuclei with , extended from the previous work for even–even nuclei (Zhang et al. (DRHBc mass table collaboration), At. Data Nucl. Data Tables 144, 101488 (2022)). The calculated binding energies, two-nucleon and one-neutron separation energies, root-mean-square (rms) radii of neutron, proton, matter, and charge distributions, quadrupole deformations, and neutron and proton Fermi surfaces are tabulated and compared with available experimental data. A total of 4829 even- nuclei are predicted to be bound, with an rms deviation of 1.433 MeV from the 1244 mass data. Good agreement with the available experimental odd–even mass differences, decay energies, and charge radii is also achieved. The description accuracy for nuclear masses and nucleon separation energies as well as the prediction for drip lines is compared with the results obtained from other relativistic and nonrelativistic density functional. The comparison shows that the DRHBc theory with PC-PK1 provides an excellent microscopic description for the masses of even- nuclei. The systematics of the nucleon separation energies, odd–even mass differences, pairing energies, two-nucleon gaps, decay energies, rms radii, quadrupole deformations, potential energy curves, neutron density distributions, and neutron mean-field potentials are discussed.
{"title":"Nuclear mass table in deformed relativistic Hartree–Bogoliubov theory in continuum, II: Even-Z nuclei","authors":"Peng Guo , Xiaojie Cao , Kangmin Chen , Zhihui Chen , Myung-Ki Cheoun , Yong-Beom Choi , Pak Chung Lam , Wenmin Deng , Jianmin Dong , Pengxiang Du , Xiaokai Du , Kangda Duan , Xiaohua Fan , Wei Gao , Lisheng Geng , Eunja Ha , Xiao-Tao He , Jinniu Hu , Jingke Huang , Kun Huang , Lianjian Zou","doi":"10.1016/j.adt.2024.101661","DOIUrl":"10.1016/j.adt.2024.101661","url":null,"abstract":"<div><p>The mass table in the deformed relativistic Hartree–Bogoliubov theory in continuum (DRHBc) with the PC-PK1 density functional has been established for even-<span><math><mi>Z</mi></math></span> nuclei with <span><math><mrow><mn>8</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>120</mn></mrow></math></span>, extended from the previous work for even–even nuclei (Zhang et al. (DRHBc mass table collaboration), At. Data Nucl. Data Tables 144, 101488 (2022)). The calculated binding energies, two-nucleon and one-neutron separation energies, root-mean-square (rms) radii of neutron, proton, matter, and charge distributions, quadrupole deformations, and neutron and proton Fermi surfaces are tabulated and compared with available experimental data. A total of 4829 even-<span><math><mi>Z</mi></math></span> nuclei are predicted to be bound, with an rms deviation of 1.433 MeV from the 1244 mass data. Good agreement with the available experimental odd–even mass differences, <span><math><mi>α</mi></math></span> decay energies, and charge radii is also achieved. The description accuracy for nuclear masses and nucleon separation energies as well as the prediction for drip lines is compared with the results obtained from other relativistic and nonrelativistic density functional. The comparison shows that the DRHBc theory with PC-PK1 provides an excellent microscopic description for the masses of even-<span><math><mi>Z</mi></math></span> nuclei. The systematics of the nucleon separation energies, odd–even mass differences, pairing energies, two-nucleon gaps, <span><math><mi>α</mi></math></span> decay energies, rms radii, quadrupole deformations, potential energy curves, neutron density distributions, and neutron mean-field potentials are discussed.</p></div>","PeriodicalId":55580,"journal":{"name":"Atomic Data and Nuclear Data Tables","volume":"158 ","pages":"Article 101661"},"PeriodicalIF":1.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141052880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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