Nuclear Data Sheets最新文献

Nuclear Data Sheets Symbols and Abbreviations 核数据表符号和缩写

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-05-13 DOI: 10.1016/S0090-3752(25)00042-0

引用次数: 0

Energy dependence of chain fission product yields from neutron-induced fission of 235U, 238U, and 239Pu 235U、238U和239Pu中子诱导裂变链式裂变生成量的能量依赖性

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-05-13 DOI: 10.1016/j.nds.2025.04.002

A.P. Tonchev , J.A. Silano , A.P.D. Ramirez , R.C. Malone , M.A. Stoyer , M.E. Gooden , T.A. Bredeweg , D.J. Vieira , J.B. Wilhelmy , S.W. Finch , C.R. Howell , W. Tornow

{"title":"Energy dependence of chain fission product yields from neutron-induced fission of 235U, 238U, and 239Pu","authors":"A.P. Tonchev , J.A. Silano , A.P.D. Ramirez , R.C. Malone , M.A. Stoyer , M.E. Gooden , T.A. Bredeweg , D.J. Vieira , J.B. Wilhelmy , S.W. Finch , C.R. Howell , W. Tornow","doi":"10.1016/j.nds.2025.04.002","DOIUrl":"10.1016/j.nds.2025.04.002","url":null,"abstract":"<div><div>The lack of completeness and systematic studies of cumulative fission product yield (FPY) from the three major actinides of 235U, 238U, and 239Pu, over a broad energy range, was the primary motivation for the LLNL-LANL-TUNL collaboration. Given the focus on resolving FPY behavior around fission spectrum neutron energies, our 2016 data provides FPY measurements in fine energy steps in the range of 0.5–5.5 MeV and an additional anchor point at 14.8 MeV. Recently, our collaboration filled the gap between second chance fission and 14.8 MeV, providing a comprehensive study at eleven incident neutron energies from 0.5 to 14.8 MeV. However, during the course of the last measurements, it was found that the reported masses of the actinide deposits in the fission ionization chambers, which were used to measure the number of fissions, were not consistent with the complementary tests. Therefore, some corrections to the old data are needed. The purpose of this paper is to summarize all of the high-yield FPY data obtained for 235U, 238U, and 239Pu isotopes using quasi-monoenergetic neutron beams at 11 incident energies ranging from <math><msub><mrow><mi>E</mi></mrow><mrow><mi>n</mi></mrow></msub><mo>=</mo><mn>0.5</mn></math> to 14.8 MeV.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"202 ","pages":"Pages 12-29"},"PeriodicalIF":2.8,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936010","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}

引用次数: 0

Remeasurement of the 239Pu(n,f)/235U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber Using Vapor-deposited Targets NIFFTE裂变时间投射室用气相沉积靶重测239Pu(n,f)/235U（n,f）截面比

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-05-13 DOI: 10.1016/j.nds.2025.04.003

引用次数: 0

Nuclear Structure and Decay Data for A=65 Isobars A=65等压线的核结构和衰变数据

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-05-13 DOI: 10.1016/j.nds.2025.04.004

Jun Chen

{"title":"Nuclear Structure and Decay Data for A=65 Isobars","authors":"Jun Chen","doi":"10.1016/j.nds.2025.04.004","DOIUrl":"10.1016/j.nds.2025.04.004","url":null,"abstract":"<div><div>Experimental nuclear structure and decay data are evaluated for 13 known nuclides of mass number A=65 (V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga Ge, As, Se, Br). Detailed evaluated level properties and related information are presented and recommended spectroscopic parameters are provided, combining all the data from various reactions and decays. At the proton-rich end, 65Br has been studied theoretically but still remains unobserved experimentally, while at the neutron-rich end, 65V has been observed, but its ground-state T1/2 and Jπ wait to be measured and determined. No excited state has been observed for 65V, 65Cr, and 65Se. The ground-state spins and/or parities of 65Fe, 65Co, 65Ge, 65As, and 65Se still have not been definitely determined. Information for excited states in 65Mn and 65As is very limited. 65Cu is the most extensively studied via 26 different reactions and decays, followed by 65Zn and 65Ga. For 65Co and 65Ni, their radioactive decay schemes are incomplete. This work supersedes earlier full evaluations of A=65 published by 2010Br10, 1993Bh04, 1986Wa02, and 1975Au08.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"202 ","pages":"Pages 57-496"},"PeriodicalIF":2.8,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936012","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}

引用次数: 0

High-precision Measurement of the 16O(n,n′γ) Cross Section using γ-ray Detection in Liquid Scintillators with H2O and BeO Targets 用γ射线检测水靶和BeO靶液体闪烁体16O（n,n′γ）截面的高精度测量

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-05-13 DOI: 10.1016/j.nds.2025.04.001

K.J. Kelly, P.A. Copp, E.A. Bennett, M. Devlin, J.M. O'Donnell, M. Paris, H. Sasaki, R.O. Nelson, J. Surbrook, C. Arnold

{"title":"High-precision Measurement of the 16O(n,n′γ) Cross Section using γ-ray Detection in Liquid Scintillators with H2O and BeO Targets","authors":"K.J. Kelly, P.A. Copp, E.A. Bennett, M. Devlin, J.M. O'Donnell, M. Paris, H. Sasaki, R.O. Nelson, J. Surbrook, C. Arnold","doi":"10.1016/j.nds.2025.04.001","DOIUrl":"10.1016/j.nds.2025.04.001","url":null,"abstract":"<div><div>The 16O(<math><mi>n</mi><mo>,</mo><msup><mrow><mi>n</mi></mrow><mrow><mo>′</mo></mrow></msup><mi>γ</mi></math>) reaction was measured at the Los Alamos Neutron Science Center white neutron source using γ-ray detection in liquid scintillators present in the upper hemisphere of the Correlated Gamma-Neutron Array for sCattering (CoGNAC). Separate measurements of this reaction were performed using H2O and BeO targets in successive years. The unique high energies of γ rays emitted from the 16O(<math><mi>n</mi><mo>,</mo><msup><mrow><mi>n</mi></mrow><mrow><mo>′</mo></mrow></msup><mi>γ</mi></math>) reaction facilitated a clean selection of this reaction from threshold to 9.8 MeV incident neutron energy without the need for precise measurements of the γ-ray energy or the scattered neutrons. The precise time resolution of the liquid scintillator detectors was then exploited to obtain high-resolution incident neutron energy measurements, and good agreement was obtained between the H2O and BeO results reported here. The dominant literature data sets for this reaction have systematic differences between them, but the present results improve upon the neutron energy resolution of earlier measurements and show important discrepancies in recent data. Tentative data are also shown up to 20 MeV incident neutron energy but are potentially subject to improved understanding of the relative γ-ray and α decay branches from 16O excited states.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"202 ","pages":"Pages 1-11"},"PeriodicalIF":2.8,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936009","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}

引用次数: 0

Nuclear Data Sheets Symbols and Abbreviations 核数据表符号和缩写

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-04-07 DOI: 10.1016/S0090-3752(25)00030-4

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Recommended Nuclear Structure and Decay Data for A=206 Isobars A=206等压线的推荐核结构和衰变数据

IF 2.8 1区物理与天体物理

Nuclear Data Sheets Pub Date : 2025-04-07 DOI: 10.1016/j.nds.2025.03.002

F.G. Kondev

引用次数: 0

Nuclear Structure and Decay Data for A=32 Isobars A=32等压线的核结构和衰变数据

IF 2.8 1区物理与天体物理