Pub Date : 2025-02-01DOI: 10.1016/j.nds.2025.01.002
M. Shamsuzzoha Basunia
Nuclear structure data pertaining to all nuclei with mass number A=81 (Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo) have been compiled and evaluated and incorporated into the ENSDF data file. This evaluation for A=81 supersedes the previous one, 2008Ba34.
Highlights of this evaluation are the following:
From fragmentation reaction studies of 238U beam at 345 MeV/nucleon on a Be target, one count has been assigned to 81Ni in 2017Su15, which is assumed to correspond to the g.s. activity of 81Ni and the Adopted Levels dataset has been proposed.
The absolute Iγ determined in 1982De36 (81Y ε decay (70.4 s)) from total Iγ/total β+ recoils implies a 97% g.s. branch (from (5/2+) to 1/2−) in the 81Y ε decay, which is discrepant compared to the g.s. feeding of <2.6 in this evaluation. The absolute Iγ of 1982De36 was not considered in the previous evaluation (2008Ba34), same in this one as well. The reason for this major discrepancy is not understood. The decay scheme normalization is consequently tentative.
81Zr g.s. half-life measurements have been reported from (113, 175, and 230γ(t)) and decay curves for β events correlated with 81Zr implantations. No additional data are available. A 81Zr ε decay (5.3 s) dataset has been created based on the data from the Adopted Levels, Gammas of 81Y.
{"title":"Nuclear Data Sheets for A=81","authors":"M. Shamsuzzoha Basunia","doi":"10.1016/j.nds.2025.01.002","DOIUrl":"10.1016/j.nds.2025.01.002","url":null,"abstract":"<div><div>Nuclear structure data pertaining to all nuclei with mass number A=81 (Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo) have been compiled and evaluated and incorporated into the ENSDF data file. This evaluation for A=81 supersedes the previous one, 2008Ba34.</div><div>Highlights of this evaluation are the following:</div><div>From fragmentation reaction studies of <sup>238</sup>U beam at 345 MeV/nucleon on a Be target, one count has been assigned to <sup>81</sup>Ni in 2017Su15, which is assumed to correspond to the g.s. activity of <sup>81</sup>Ni and the Adopted Levels dataset has been proposed.</div><div>The absolute I<em>γ</em> determined in 1982De36 (<sup>81</sup>Y <em>ε</em> decay (70.4 s)) from total I<em>γ</em>/total <em>β</em><sup>+</sup> recoils implies a 97% g.s. branch (from (5/2<sup>+</sup>) to 1/2<sup>−</sup>) in the <sup>81</sup>Y <em>ε</em> decay, which is discrepant compared to the g.s. feeding of <2.6 in this evaluation. The absolute I<em>γ</em> of 1982De36 was not considered in the previous evaluation (2008Ba34), same in this one as well. The reason for this major discrepancy is not understood. The decay scheme normalization is consequently tentative.</div><div><sup>81</sup>Zr g.s. half-life measurements have been reported from (113, 175, and 230<em>γ</em>(t)) and decay curves for <em>β</em> events correlated with <sup>81</sup>Zr implantations. No additional data are available. A <sup>81</sup>Zr <em>ε</em> decay (5.3 s) dataset has been created based on the data from the Adopted Levels, Gammas of <sup>81</sup>Y.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"199 ","pages":"Pages 271-612"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-01DOI: 10.1016/S0090-3752(25)00008-0
{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(25)00008-0","DOIUrl":"10.1016/S0090-3752(25)00008-0","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"199 ","pages":"Page IBC"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-12-01DOI: 10.1016/S0090-3752(24)00068-1
{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(24)00068-1","DOIUrl":"10.1016/S0090-3752(24)00068-1","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"198 ","pages":"Page IBC"},"PeriodicalIF":2.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-12-01DOI: 10.1016/j.nds.2024.11.001
J.H. Kelley , C.G. Sheu , J.E. Purcell
Experimental nuclear spectroscopic data are evaluated for the 7 known nuclides of mass 13 (Li, Be, B, C, N, O, F). Detailed information is compiled and presented for each reaction and decay experiment. The results are combined and used to provide a set of recommended values that include level energies, spins and parities, half-lives of levels, decay branching ratios, and other nuclear properties. This work supersedes the earlier work by Fay Ajzenberg-Selove (1990Aj01) published in Nuclear Physics A 523 (1991) 1. Earlier reviews were published in (1986Aj01, 1981Aj01, 1976Aj04, 1970Aj04, 1959Aj76).
{"title":"Energy Levels of Light Nuclei A=13","authors":"J.H. Kelley , C.G. Sheu , J.E. Purcell","doi":"10.1016/j.nds.2024.11.001","DOIUrl":"10.1016/j.nds.2024.11.001","url":null,"abstract":"<div><div>Experimental nuclear spectroscopic data are evaluated for the 7 known nuclides of mass 13 (Li, Be, B, C, N, O, F). Detailed information is compiled and presented for each reaction and decay experiment. The results are combined and used to provide a set of recommended values that include level energies, spins and parities, half-lives of levels, decay branching ratios, and other nuclear properties. This work supersedes the earlier work by Fay Ajzenberg-Selove (1990Aj01) published in Nuclear Physics A <strong>523</strong> (1991) 1. Earlier reviews were published in (1986Aj01, 1981Aj01, 1976Aj04, 1970Aj04, 1959Aj76).</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"198 ","pages":"Pages 1-448"},"PeriodicalIF":2.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-12-01DOI: 10.1016/j.nds.2024.11.002
C.D. Nesaraja
Available information pertaining to the nuclear structure of ground and excited states for all known nuclei with mass number have been compiled and evaluated. The adopted level and decay schemes, as well as the detailed nuclear properties and configuration assignments based on experimental data, are presented for these nuclides. When there are insufficient data, expected values from systematics of nuclear properties and/or theoretical calculations are utilized. Unexpected or discrepant experimental results are also noted. In cases where weighted averaging procedures have been used, the assigned uncertainty in the result is generally not lower than the lowest uncertainty in the data points used in the procedure.
{"title":"Nuclear Data Sheets for A=246","authors":"C.D. Nesaraja","doi":"10.1016/j.nds.2024.11.002","DOIUrl":"10.1016/j.nds.2024.11.002","url":null,"abstract":"<div><div>Available information pertaining to the nuclear structure of ground and excited states for all known nuclei with mass number <span><math><mi>A</mi><mo>=</mo><mn>246</mn></math></span> have been compiled and evaluated. The adopted level and decay schemes, as well as the detailed nuclear properties and configuration assignments based on experimental data, are presented for these nuclides. When there are insufficient data, expected values from systematics of nuclear properties and/or theoretical calculations are utilized. Unexpected or discrepant experimental results are also noted. In cases where weighted averaging procedures have been used, the assigned uncertainty in the result is generally not lower than the lowest uncertainty in the data points used in the procedure.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"198 ","pages":"Pages 449-534"},"PeriodicalIF":2.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-09-02DOI: 10.1016/j.nds.2024.08.001
M. Shamsuzzoha Basunia, Anagha Chakraborty
Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for 30F, 30Ne, 30Na, 30Mg, 30Al, 30Si, 30P, 30S, 30Cl, and 30Ar. The recommended values for the level energies and their percentage decay modes, level lifetimes, γ energies, γ branching ratios, transition probabilities, etc. are presented. Among these nuclides, 30F is unobserved and most likely particle unbound. Additional experimental data are required for firm spin-parity assignments of the low-lying excited levels of 30Ne. The most well studied nuclide is 30Si followed by 30P. The data for the most proton-rich nuclide 30Ar are presented following the recent work of 2018Xu04 and 2015Mu13. This evaluation for A=30 supersedes the previous one, 2010Ba29.
{"title":"Nuclear Data Sheets for A=30","authors":"M. Shamsuzzoha Basunia, Anagha Chakraborty","doi":"10.1016/j.nds.2024.08.001","DOIUrl":"10.1016/j.nds.2024.08.001","url":null,"abstract":"<div><p>Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for <sup>30</sup>F, <sup>30</sup>Ne, <sup>30</sup>Na, <sup>30</sup>Mg, <sup>30</sup>Al, <sup>30</sup>Si, <sup>30</sup>P, <sup>30</sup>S, <sup>30</sup>Cl, and <sup>30</sup>Ar. The recommended values for the level energies and their percentage decay modes, level lifetimes, <em>γ</em> energies, <em>γ</em> branching ratios, transition probabilities, <em>etc.</em> are presented. Among these nuclides, <sup>30</sup>F is unobserved and most likely particle unbound. Additional experimental data are required for firm spin-parity assignments of the low-lying excited levels of <sup>30</sup>Ne. The most well studied nuclide is <sup>30</sup>Si followed by <sup>30</sup>P. The data for the most proton-rich nuclide <sup>30</sup>Ar are presented following the recent work of 2018Xu04 and 2015Mu13. This evaluation for A=30 supersedes the previous one, 2010Ba29.</p></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"197 ","pages":"Pages 1-258"},"PeriodicalIF":2.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-09-02DOI: 10.1016/S0090-3752(24)00058-9
{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(24)00058-9","DOIUrl":"10.1016/S0090-3752(24)00058-9","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"197 ","pages":"Page IBC"},"PeriodicalIF":2.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2024-09-02DOI: 10.1016/j.nds.2024.08.002
C. Morse
The experimental reaction and decay studies producing nuclei in the A=230 mass chain have been reviewed. Data on elements from radon (Z=86) to americium (Z=95) are included, and level and decay schemes are presented for these nuclides. This work supersedes the previous evaluation for this mass chain (2012Br12).
{"title":"Nuclear Structure and Decay Data for A=230","authors":"C. Morse","doi":"10.1016/j.nds.2024.08.002","DOIUrl":"10.1016/j.nds.2024.08.002","url":null,"abstract":"<div><p>The experimental reaction and decay studies producing nuclei in the A=230 mass chain have been reviewed. Data on elements from radon (Z=86) to americium (Z=95) are included, and level and decay schemes are presented for these nuclides. This work supersedes the previous evaluation for this mass chain (2012Br12).</p></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"197 ","pages":"Pages 259-371"},"PeriodicalIF":2.8,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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.nds.2024.06.002
S. Pommé , K. Pelczar
Evidence suggests that the uncertainties reported in a widely referenced paper by Houtermans et al. in Int. J. Appl. Radiat. Isot. 31, 153 (1980) have been significantly underestimated, potentially by an order of magnitude. Up to the present date, this has had implications for the accuracy of the reference half-life and uncertainty values derived from evaluations of literature data. The current study aims to propose more realistic uncertainty values that can serve as a foundation for future re-evaluations. Additionally, it is suggested that similar corrections could be considered for other historical papers to ensure consistency across the field. Although the approach to rectifying old data may involve some degree of subjectivity, it offers a practical and effective way to incorporate the historical decay data until they can be replaced by more precise measurements accompanied by comprehensive uncertainty assessments.
{"title":"A case of understated uncertainties in half-life measurements","authors":"S. Pommé , K. Pelczar","doi":"10.1016/j.nds.2024.06.002","DOIUrl":"10.1016/j.nds.2024.06.002","url":null,"abstract":"<div><p>Evidence suggests that the uncertainties reported in a widely referenced paper by Houtermans et al. in <em>Int. J. Appl. Radiat. Isot. 31, 153 (1980)</em> have been significantly underestimated, potentially by an order of magnitude. Up to the present date, this has had implications for the accuracy of the reference half-life and uncertainty values derived from evaluations of literature data. The current study aims to propose more realistic uncertainty values that can serve as a foundation for future re-evaluations. Additionally, it is suggested that similar corrections could be considered for other historical papers to ensure consistency across the field. Although the approach to rectifying old data may involve some degree of subjectivity, it offers a practical and effective way to incorporate the historical decay data until they can be replaced by more precise measurements accompanied by comprehensive uncertainty assessments.</p></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"196 ","pages":"Pages 12-16"},"PeriodicalIF":2.8,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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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