Pub Date : 2023-01-27DOI: 10.1088/1361-6471/acc394
T. Bezerra, A. Borkum, E. Church, C. Cuesta, Z. Djurcic, J. Genovesi, J. Haiston, C. Jackson, I. Lazanu, B. Monreal, Sylvia Munson, C. Ortiz, M. Parvu, S. Peeters, D. Pershey, Sagar Sharma Poudel, J. Reichenbacher, R. Saldanha, K. Scholberg, G. Sinev, S. Westerdale, J. Zennamo
We find that it is possible to increase sensitivity to low energy physics in a third or fourth DUNE-like module with careful controls over radiopurity and targeted modifications to a detector similar to the DUNE Far Detector design. In particular, sensitivity to supernova and solar neutrinos can be enhanced with improved MeV-scale reach. A neutrinoless double beta decay search with $^{136}$Xe loading appears feasible. Furthermore, sensitivity to Weakly-Interacting Massive Particle (WIMP) Dark Matter (DM) becomes competitive with the planned world program in such a detector, offering a unique seasonal variation detection that is characteristic for the nature of WIMPs.
{"title":"Large low background kTon-scale liquid argon time projection chambers","authors":"T. Bezerra, A. Borkum, E. Church, C. Cuesta, Z. Djurcic, J. Genovesi, J. Haiston, C. Jackson, I. Lazanu, B. Monreal, Sylvia Munson, C. Ortiz, M. Parvu, S. Peeters, D. Pershey, Sagar Sharma Poudel, J. Reichenbacher, R. Saldanha, K. Scholberg, G. Sinev, S. Westerdale, J. Zennamo","doi":"10.1088/1361-6471/acc394","DOIUrl":"https://doi.org/10.1088/1361-6471/acc394","url":null,"abstract":"\u0000 We find that it is possible to increase sensitivity to low energy physics in a third or fourth DUNE-like module with careful controls over radiopurity and targeted modifications to a detector similar to the DUNE Far Detector design. In particular, sensitivity to supernova and solar neutrinos can be enhanced with improved MeV-scale reach. A neutrinoless double beta decay search with $^{136}$Xe loading appears feasible. Furthermore, sensitivity to Weakly-Interacting Massive Particle (WIMP) Dark Matter (DM) becomes competitive with the planned world program in such a detector, offering a unique seasonal variation detection that is characteristic for the nature of WIMPs.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42082388","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 : 2023-01-20DOI: 10.1088/1361-6471/acb507
X. Dai, Yu Yun Wang, Duo Li, Jiawei Zhao, Yanliang Han, F. Han, K. Fang
To obtain the cross sections of the 9Be(d, t)8Be reaction, a thick beryllium target was bombarded with a deuteron beam from 78 to 100 keV, with an energy step of 2 keV. The charged particles emitted from the d-9Be interaction were accumulated, and the cross sections were deduced from the thick-target yields of emitted tritium. The present work, in conjunction with the data reported in the high-energy region, extended the directly measured values of cross section to 65 keV in the center-of-mass system, thereby filling in the nuclear data gap in the low-energy region.
{"title":"Cross-section measurements for 9Be(d, t)8Be reaction at the low-energy region (E < 100 keV)","authors":"X. Dai, Yu Yun Wang, Duo Li, Jiawei Zhao, Yanliang Han, F. Han, K. Fang","doi":"10.1088/1361-6471/acb507","DOIUrl":"https://doi.org/10.1088/1361-6471/acb507","url":null,"abstract":"\u0000 To obtain the cross sections of the 9Be(d, t)8Be reaction, a thick beryllium target was bombarded with a deuteron beam from 78 to 100 keV, with an energy step of 2 keV. The charged particles emitted from the d-9Be interaction were accumulated, and the cross sections were deduced from the thick-target yields of emitted tritium. The present work, in conjunction with the data reported in the high-energy region, extended the directly measured values of cross section to 65 keV in the center-of-mass system, thereby filling in the nuclear data gap in the low-energy region.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46142079","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 : 2023-01-20DOI: 10.1088/1361-6471/acd0c7
B. Weiss, J. Paquet, S. Bass
Bayesian parameter estimation provides a systematic approach to compare heavy ion collision models with measurements, leading to constraints on the properties of nuclear matter with proper accounting of experimental and theoretical uncertainties. Aside from statistical and systematic model uncertainties, interpolation uncertainties can also play a role in Bayesian inference, if the model’s predictions can only be calculated at a limited set of model parameters. This uncertainty originates from using an emulator to interpolate the model’s prediction across a continuous space of parameters. In this work, we study the trade-offs between the emulator (interpolation) and statistical uncertainties. We perform the analysis using spatial eccentricities from the TRENTo model of initial conditions for nuclear collisions. Given a fixed computational budget, we study the optimal compromise between the number of parameter samples and the number of collisions simulated per parameter sample. For the observables and parameters used in the present study, we find that the best constraints are achieved when the number of parameter samples is slightly smaller than the number of collisions simulated per parameter sample.
{"title":"Computational budget optimization for Bayesian parameter estimation in heavy-ion collisions","authors":"B. Weiss, J. Paquet, S. Bass","doi":"10.1088/1361-6471/acd0c7","DOIUrl":"https://doi.org/10.1088/1361-6471/acd0c7","url":null,"abstract":"\u0000 Bayesian parameter estimation provides a systematic approach to compare heavy ion collision models with measurements, leading to constraints on the properties of nuclear matter with proper accounting of experimental and theoretical uncertainties. Aside from statistical and systematic model uncertainties, interpolation uncertainties can also play a role in Bayesian inference, if the model’s predictions can only be calculated at a limited set of model parameters. This uncertainty originates from using an emulator to interpolate the model’s prediction across a continuous space of parameters. In this work, we study the trade-offs between the emulator (interpolation) and statistical uncertainties. We perform the analysis using spatial eccentricities from the TRENTo model of initial conditions for nuclear collisions. Given a fixed computational budget, we study the optimal compromise between the number of parameter samples and the number of collisions simulated per parameter sample. For the observables and parameters used in the present study, we find that the best constraints are achieved when the number of parameter samples is slightly smaller than the number of collisions simulated per parameter sample.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46426339","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 : 2023-01-19DOI: 10.1088/1361-6471/acb4b1
B. Pandya, Manan Shah, P. Vinodkumar
The mass spectra for the heavy-light $(bbar{q}) ;$ $q = u$ or $d$ and $s$ bottom and bottom strange mesons are computed based on the instanton induced interactions inspired potential along with additional confinement term. Spectroscopic predictions for ground, radial and orbital states are provided. The low-lying states $1S$ and $1P$ are found to be in an excellent agreement with the PDG reported values. The predicted mass spectra strongly support the newly observed $B_J(5840)$ and $B_J(5970)$ by $LHCb$ collaboration as $2^1S_0$ and $1^3D_3$ states respectively. Apart from the mass spectra, the other observables like radiative transitions, decay constant for $1S$ state, the di-leptonic rare decays and the Cabibbo allowed two body hadronic decays are also predicted. The predicted value of branching ratio of rare decay $B_s^0 rightarrow mu^+ mu^-$ as 3.65 $times 10^{-9}$ is in excellent agreement with the recent measurement of $LHCb$ of $(3.09^{+0.46}_{-0.43}) times 10^{-9}$. The branching ratios of color favoured decays $B_{(s)} rightarrow D^{(*)-}_{(s)} pi^+$ and $B_{(s)} rightarrow D^{(*)-}_{(s)} rho^+$ are found to be exceeding by factor of two as compared to the PDG listed values. The mixing parameters of $B^0_q - bar{B^0_q}$, $Delta M_q, x_q$ and $chi_q$ are obtained as $0.512$, $0.755$ and $0.1877$ respectively which are very close to the PDG listed values of $0.5065 pm 0.0019$, $0.769 pm 0.004$ and $0.1858 pm 0.0011$ respectively.
{"title":"Mass spectroscopy, decays and mixing parameters of open flavour bottom and bottom strange mesons using instanton induced potential with additional confinement","authors":"B. Pandya, Manan Shah, P. Vinodkumar","doi":"10.1088/1361-6471/acb4b1","DOIUrl":"https://doi.org/10.1088/1361-6471/acb4b1","url":null,"abstract":"\u0000 The mass spectra for the heavy-light $(bbar{q}) ;$ $q = u$ or $d$ and $s$ bottom and bottom strange mesons are computed based on the instanton induced interactions inspired potential along with additional confinement term. Spectroscopic predictions for ground, radial and orbital states are provided. The low-lying states $1S$ and $1P$ are found to be in an excellent agreement with the PDG reported values. The predicted mass spectra strongly support the newly observed $B_J(5840)$ and $B_J(5970)$ by $LHCb$ collaboration as $2^1S_0$ and $1^3D_3$ states respectively. Apart from the mass spectra, the other observables like radiative transitions, decay constant for $1S$ state, the di-leptonic rare decays and the Cabibbo allowed two body hadronic decays are also predicted. The predicted value of branching ratio of rare decay $B_s^0 rightarrow mu^+ mu^-$ as 3.65 $times 10^{-9}$ is in excellent agreement with the recent measurement of $LHCb$ of $(3.09^{+0.46}_{-0.43}) times 10^{-9}$. The branching ratios of color favoured decays $B_{(s)} rightarrow D^{(*)-}_{(s)} pi^+$ and $B_{(s)} rightarrow D^{(*)-}_{(s)} rho^+$ are found to be exceeding by factor of two as compared to the PDG listed values. The mixing parameters of $B^0_q - bar{B^0_q}$, $Delta M_q, x_q$ and $chi_q$ are obtained as $0.512$, $0.755$ and $0.1877$ respectively which are very close to the PDG listed values of $0.5065 pm 0.0019$, $0.769 pm 0.004$ and $0.1858 pm 0.0011$ respectively.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44728423","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 : 2023-01-19DOI: 10.1088/1361-6471/acb4b2
T. Zhao, X. Bao, Hongfei Zhang
Multinucleon transfer reactions are currently a powerful way to synthesize red{neutron rich nuclei}. To explore the effect of nucleus deformation and mirror nucleus shell corrections energy in the nucleus mass model on the calculation of multinucleon transfer reaction cross sections in the dinuclear system(DNS) model. In this paper, three macroscopic-microscopic mass models are selected and the transfer reaction cross sections are calculated for $^{136}$Xe+$^{208}$Pb and $^{64}$Ni+$^{238}$U by improved DNS model+GEMINI++, respectively. The mirror nucleus shell correction energy does not improve the accuracy of the cross section of the transfer reaction. red{The introduction of a different dependence of the Coulomb and surface energy on the deformation can improve the calculation of the transfer reaction cross section when the projectile and target nuclei are deformed nuclei.}
{"title":"Effect of deformation dependence and mirror nucleus corrections energy on multinucleon transfer reaction cross sections","authors":"T. Zhao, X. Bao, Hongfei Zhang","doi":"10.1088/1361-6471/acb4b2","DOIUrl":"https://doi.org/10.1088/1361-6471/acb4b2","url":null,"abstract":"\u0000 Multinucleon transfer reactions are currently a powerful way to synthesize red{neutron rich nuclei}. To explore the effect of nucleus deformation and mirror nucleus shell corrections energy in the nucleus mass model on the calculation of multinucleon transfer reaction cross sections in the dinuclear system(DNS) model. In this paper, three macroscopic-microscopic mass models are selected and the transfer reaction cross sections are calculated for $^{136}$Xe+$^{208}$Pb and $^{64}$Ni+$^{238}$U by improved DNS model+GEMINI++, respectively. The mirror nucleus shell correction energy does not improve the accuracy of the cross section of the transfer reaction. red{The introduction of a different dependence of the Coulomb and surface energy on the deformation can improve the calculation of the transfer reaction cross section when the projectile and target nuclei are deformed nuclei.}","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42618837","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 : 2023-01-18DOI: 10.1088/1361-6471/acb452
Tomas Giudice, D. Abriola, A. Arazi, E. de Barbará, María Angélica Cardona, Jorge Gómez, Daniel A. Hojman, R. I. Id Betan, M. Kohen, Natalia Llaneza, G. Martı́, B. Paes, D. Schneider, H. Soler, J. Lubian
Measurements of the elastic scattering angular distribution for the d + 197Au system were carried out covering deuteron incident energies in the range from 5 to 16 MeV, i.e. approximately 50% below and above the Coulomb barrier. A critical interaction distance of dI = 2.49 fm was determined from these distributions, which is comparable to that of the radioactive halo nucleus 6He. The experimental angular distributions were systematically analyzed using two alternative models: the semimicroscopic São Paulo and the effective Woods-Saxon optical potentials, for which the best-fitting parameters were determined. These potentials, integrated in the vicinity of the sensitivity radius, were calculated for each energy. For both models, the energy dependence of these integrals presented the breakup threshold anomaly around the coulomb barrier, a typical signature of weakly bound nuclei.
{"title":"Study of the threshold anomaly in the elastic scattering of d + 197Au","authors":"Tomas Giudice, D. Abriola, A. Arazi, E. de Barbará, María Angélica Cardona, Jorge Gómez, Daniel A. Hojman, R. I. Id Betan, M. Kohen, Natalia Llaneza, G. Martı́, B. Paes, D. Schneider, H. Soler, J. Lubian","doi":"10.1088/1361-6471/acb452","DOIUrl":"https://doi.org/10.1088/1361-6471/acb452","url":null,"abstract":"\u0000 Measurements of the elastic scattering angular distribution for the d + 197Au system were carried out covering deuteron incident energies in the range from 5 to 16 MeV, i.e. approximately 50% below and above the Coulomb barrier. A critical interaction distance of dI = 2.49 fm was determined from these distributions, which is comparable to that of the radioactive halo nucleus 6He. The experimental angular distributions were systematically analyzed using two alternative models: the semimicroscopic São Paulo and the effective Woods-Saxon optical potentials, for which the best-fitting parameters were determined. These potentials, integrated in the vicinity of the sensitivity radius, were calculated for each energy. For both models, the energy dependence of these integrals presented the breakup threshold anomaly around the coulomb barrier, a typical signature of weakly bound nuclei.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44717154","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 : 2023-01-12DOI: 10.1088/1361-6471/acb282
Bao-Yue Hu, Yu Zhang, Gui-Xiu Na, Sheng-Nan Wang, Wei Teng
A scheme of solving the proton-neutron interacting boson model (IBM-2) in terms of the SU(3) basis is introduced, by which the IBM-2 coupled with an octupole boson is applied to describe the low-energy structure of the critical point nucleus, $^{152}$Sm. The results indicate that the spectral properties of both the positive-parity bands and negative-parity bands in this nucleus can be well captured by the IBM-2 calculations through a simple Hamiltonian, providing an example of the IBM-2 in a unified description of quadrupole and octupole states in transitional systems. In addition, a statistical analysis of the low-spin states in the model is also provided.
{"title":"Quadrupole and octupole states in 152Sm using the proton-neutron interacting boson model","authors":"Bao-Yue Hu, Yu Zhang, Gui-Xiu Na, Sheng-Nan Wang, Wei Teng","doi":"10.1088/1361-6471/acb282","DOIUrl":"https://doi.org/10.1088/1361-6471/acb282","url":null,"abstract":"\u0000 A scheme of solving the proton-neutron interacting boson model (IBM-2) in terms of the SU(3) basis is introduced, by which the IBM-2 coupled with an octupole boson is applied to describe the low-energy structure of the critical point nucleus, $^{152}$Sm. The results indicate that the spectral properties of both the positive-parity bands and negative-parity bands in this nucleus can be well captured by the IBM-2 calculations through a simple Hamiltonian, providing an example of the IBM-2 in a unified description of quadrupole and octupole states in transitional systems. In addition, a statistical analysis of the low-spin states in the model is also provided.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48224401","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 : 2023-01-10DOI: 10.1088/1361-6471/acb1cb
H. Manjunatha, P. S. Damodara Gupta, N. Sowmya, N. Manjunatha, K. Sridhar, L. Seenappa, T. Nandi
We have developed an empirical formula for survival probability for the superheavy nuclei by analyzing about 95 fusion experiments, which were classified into four categories based on the deformation parameters of a projectile-target system. Every category is analyzed in ten different entrance channel parameters; one of these displays the smoothest variation. That channel is none but the Z2/A, where Z and A are the atomic number and mass number, respectively. Further, the predicted empirical relation is improved by the inclusion of the fission barrier, separation energy, level density parameter, center of mass energy and fusion barrier height for the Z2/A term. Furthermore, the ER cross section is maximum at certain beam energy called the optimal energy. Thus finding the survival probability at the optimal energy is important to synthesizing a superheavy nucleus. We have developed an empirical formula for the survival probability at the optimal energy to facilitate future superheavy nuclei synthesis.
{"title":"Survival probability of compound nuclei in heavy ion fusion reaction","authors":"H. Manjunatha, P. S. Damodara Gupta, N. Sowmya, N. Manjunatha, K. Sridhar, L. Seenappa, T. Nandi","doi":"10.1088/1361-6471/acb1cb","DOIUrl":"https://doi.org/10.1088/1361-6471/acb1cb","url":null,"abstract":"\u0000 We have developed an empirical formula for survival probability for the superheavy nuclei by analyzing about 95 fusion experiments, which were classified into four categories based on the deformation parameters of a projectile-target system. Every category is analyzed in ten different entrance channel parameters; one of these displays the smoothest variation. That channel is none but the Z2/A, where Z and A are the atomic number and mass number, respectively. Further, the predicted empirical relation is improved by the inclusion of the fission barrier, separation energy, level density parameter, center of mass energy and fusion barrier height for the Z2/A term. Furthermore, the ER cross section is maximum at certain beam energy called the optimal energy. Thus finding the survival probability at the optimal energy is important to synthesizing a superheavy nucleus. We have developed an empirical formula for the survival probability at the optimal energy to facilitate future superheavy nuclei synthesis.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45819170","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 : 2023-01-06DOI: 10.1088/1361-6471/acb0e8
M. Anwar, A. Hemmdan
In the framework of the optical model, the elastic scattering of the radioactive projectile 7Be on the 28Si target at four energies near Coulomb barrier has been analyzed. The cluster folding model is used to determine the real part of the nuclear optical potential. For comparison, two microscopic optical potentials have been generated using the DDM3Y effective NN interaction based upon two different forms for 7Be density distribution. All the obtained real potentials, in conjunction with phenomenological Woods-Saxon imaginary parts, have successfully reproduced the elastic scattering angular distributions over the measured angular range. The energy dependence of the real and imaginary strengths that are produced by the best fit of the experimental data was examined. Neither the usual threshold anomaly nor the breakup threshold anomaly can be observed at the considered energy ranges. The obtained cross sections have been reduced and compared with earlier theoretical and experimental data of 7Li on the same target near the Coulomb barrier.
{"title":"Cluster folding model analysis of the 7Be+28Si elastic scattering in the near-barrier","authors":"M. Anwar, A. Hemmdan","doi":"10.1088/1361-6471/acb0e8","DOIUrl":"https://doi.org/10.1088/1361-6471/acb0e8","url":null,"abstract":"\u0000 In the framework of the optical model, the elastic scattering of the radioactive projectile 7Be on the 28Si target at four energies near Coulomb barrier has been analyzed. The cluster folding model is used to determine the real part of the nuclear optical potential. For comparison, two microscopic optical potentials have been generated using the DDM3Y effective NN interaction based upon two different forms for 7Be density distribution. All the obtained real potentials, in conjunction with phenomenological Woods-Saxon imaginary parts, have successfully reproduced the elastic scattering angular distributions over the measured angular range. The energy dependence of the real and imaginary strengths that are produced by the best fit of the experimental data was examined. Neither the usual threshold anomaly nor the breakup threshold anomaly can be observed at the considered energy ranges. The obtained cross sections have been reduced and compared with earlier theoretical and experimental data of 7Li on the same target near the Coulomb barrier.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48323408","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 : 2023-01-04DOI: 10.1088/1361-6471/acaffc
Rishabh Kumar, R. Prajapat, M. Maiti
More focused investigations are required to better understand the different modes of fusion phenomena in weakly bound projectiles. In order to comprehend the reaction mechanism of weakly bound projectiles, a new measurement of the evaporation residue cross sections from the $^6$Li induced reaction on $^{181}$Ta in the 4.5 -- 7.1 MeV/nucleon energy range has been reported in this article. The $gamma$--ray spectrometry has been employed to identify the $^{183m,g}$Os, $^{182}$Os, $^{183}$Re, and $^{183,182m2,180}$Ta residues produced in the reaction via different evaporation channels. The textsc{EMPIRE-3.2.2} code, which houses both the equilibrium (EQ) and pre-equilibrium (PEQ) models in its framework, and textsc{PACE4} have been tasked to analyze the measured excitation functions. Out of the two, textsc{EMPIRE-3.2.2} demonstrates better agreement with the data. A systematic analysis of the measured data and theoretical background indicates that the complete and incomplete fusion (ICF) of $^6$Li contribute to the residual cross sections. Thus, the strength of the partial fusion has been inferred. Further, the neutron transfer channels have been found to contribute significantly to the reaction dynamics; hence they are investigated using the coupled reaction channel (CRC) calculations and discussed in detail. The isomeric cross section ratio obtained from the measured residual cross sections of the isomeric pair of $^{183}$Os highlights the significance of angular momentum and relative spins of the ground and isomeric states as a function of projectile incident energy.
{"title":"Facets of reaction mechanism in 6Li+181Ta system","authors":"Rishabh Kumar, R. Prajapat, M. Maiti","doi":"10.1088/1361-6471/acaffc","DOIUrl":"https://doi.org/10.1088/1361-6471/acaffc","url":null,"abstract":"\u0000 More focused investigations are required to better understand the different modes of fusion phenomena in weakly bound projectiles. In order to comprehend the reaction mechanism of weakly bound projectiles, a new measurement of the evaporation residue cross sections from the $^6$Li induced reaction on $^{181}$Ta in the 4.5 -- 7.1 MeV/nucleon energy range has been reported in this article. The $gamma$--ray spectrometry has been employed to identify the $^{183m,g}$Os, $^{182}$Os, $^{183}$Re, and $^{183,182m2,180}$Ta residues produced in the reaction via different evaporation channels. The textsc{EMPIRE-3.2.2} code, which houses both the equilibrium (EQ) and pre-equilibrium (PEQ) models in its framework, and textsc{PACE4} have been tasked to analyze the measured excitation functions. Out of the two, textsc{EMPIRE-3.2.2} demonstrates better agreement with the data. A systematic analysis of the measured data and theoretical background indicates that the complete and incomplete fusion (ICF) of $^6$Li contribute to the residual cross sections. Thus, the strength of the partial fusion has been inferred. Further, the neutron transfer channels have been found to contribute significantly to the reaction dynamics; hence they are investigated using the coupled reaction channel (CRC) calculations and discussed in detail. The isomeric cross section ratio obtained from the measured residual cross sections of the isomeric pair of $^{183}$Os highlights the significance of angular momentum and relative spins of the ground and isomeric states as a function of projectile incident energy.","PeriodicalId":16766,"journal":{"name":"Journal of Physics G: Nuclear and Particle Physics","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43874469","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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