Nuclear Data Sheets最新文献

{"title":"New Procedure for the Evaluation of Fission Product Yields: Application to the Spontaneous Fission of 252Cf","authors":"A.E. Lovell,&nbsp;T. Kawano,&nbsp;P. Talou","doi":"10.1016/j.nds.2026.08.001","DOIUrl":"10.1016/j.nds.2026.08.001","url":null,"abstract":"<div><div>Over the last decade, there has been significant improvement in the understanding and modeling of the decay of fission fragments by both prompt and delayed emission. These model improvements open the door for performing consistent evaluations across multiple fission observables, providing not only mean values but also covariances between observables. One such model is the Hauser-Feshbach Fission Fragment Decay model implemented in BeoH, which uses distributions of initial conditions of fission fragments to perform a Hauser-Feshbach decay for prompt neutron and <em>γ</em>-ray emission and evaluated decay data to calculate cumulative fission product yields. This manuscript describes a new evaluation procedure for independent and cumulative fission product yields, including full correlations among the fission products. We use a Bayesian Kalman filter to fit both experimental cumulative fission product yields and those from the ENDF/B-VIII.0 evaluated library, producing mean values and covariances. In addition to comparing the fission products from these optimizations, we calculate prompt and delayed neutron and <em>γ</em>-ray multiplicities using the fitted parameters and compare to some available experimental data. We see reasonable agreement, even when these quantities are not included in the optimization.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"212 ","pages":"Pages 1-17"},"PeriodicalIF":2.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859588","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}

{"title":"Nuclear Structure and Decay Data for A=220 Isobars","authors":"J. Chen,&nbsp;M.S. Basunia,&nbsp;P. Dimitriou,&nbsp;E.A. McCutchan,&nbsp;A. Negret,&nbsp;A.A. Alshammari,&nbsp;M.J. Kobra,&nbsp;A.H. Lopez Gonzales,&nbsp;A. Malinowski,&nbsp;S. Nagarajan,&nbsp;E.B. O'Sullivan,&nbsp;N. Palalani,&nbsp;N. Petrov,&nbsp;L. Rodrigues,&nbsp;B. Salmassian","doi":"10.1016/j.nds.2026.08.002","DOIUrl":"10.1016/j.nds.2026.08.002","url":null,"abstract":"<div><div>This work presents a comprehensive and critical evaluation of experimental nuclear spectroscopic data from reactions and decays for all 11 known nuclides with mass number A=220 (Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, and Np). Recommended values are produced for level energies, spins and parities, half-lives, and radiation properties including energies, branching ratios, and multipolarities of <em>γ</em> rays, as well as characteristics of <em>β</em> and <em>α</em> radiation decays, based on all available experimental data. This work supersedes previous A=220 evaluations: 2011Br05, 1997Ar04, 1986Ma45, 1976El04.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"212 ","pages":"Pages 18-140"},"PeriodicalIF":2.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859590","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}

{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(26)00049-9","DOIUrl":"10.1016/S0090-3752(26)00049-9","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"212 ","pages":"Page IBC"},"PeriodicalIF":2.5,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148859591","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}

{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(26)00041-4","DOIUrl":"10.1016/S0090-3752(26)00041-4","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"211 ","pages":"Page IBC"},"PeriodicalIF":2.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141138","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}

{"title":"Nuclear Structure and Decay Data for A=35 Isobars","authors":"Lijie Sun,&nbsp;Jun Chen","doi":"10.1016/j.nds.2026.05.001","DOIUrl":"10.1016/j.nds.2026.05.001","url":null,"abstract":"<div><div>This work presents a comprehensive and critical evaluation of experimental nuclear spectroscopic data from reactions and decays for all 11 known nuclides with mass number 35 (Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca). Recommended values are produced for level energies, spins and parities, half-lives, and radiation properties including energies, branching ratios, and multipolarities of <em>γ</em> rays, as well as characteristics of <em>β</em> radiation decays, based on a rigorous assessment of all available experimental data. Discrepancies among existing results are carefully addressed. This work supersedes earlier full evaluations of A=35 published by 2011Ch48, 1990En08 (also 1998En04 update) and 1978En02.</div><div>³⁵Cl remains the most extensively studied nuclide, investigated through 28 different reactions and decays, followed by ³⁵S, ³⁵P, and ³⁵Ar. For ³⁵Na, only two excited states have been observed, and its <em>β</em>⁻-decay scheme has not yet been established. For ³⁵Mg, no <em>γ</em> rays have been placed with certainty, and no decay dataset exists on ³⁵Mg→³⁵Al. ³⁵Ar resonances of astrophysical interest have been studied via transfer reactions and ³⁵K <em>ε</em>+<em>β</em>⁺ decays, but their properties are yet to be determined. For ³⁵K, many excited states discovered via ³⁵Ca <em>ε</em>+<em>β</em>⁺ decay are unresolved. For ³⁵Ca, no <em>γ</em> rays have been observed and only one excited state has been identified. Notably, ³⁵Ca is the only nuclide in this mass chain that decays by <em>ε</em>+<em>β</em>⁺-delayed two protons, although the emission mechanism remains unclear.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"211 ","pages":"Pages 1-422"},"PeriodicalIF":2.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148141137","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}

{"title":"Beta-delayed gamma spectra compilation and analysis following the thermal-neutron induced fission of 235U, 239,241Pu","authors":"Z. Harris ,&nbsp;B. Hill ,&nbsp;S. Kim ,&nbsp;A. Mattera ,&nbsp;E.A. McCutchan ,&nbsp;O. Palaguachi ,&nbsp;M. Seeley ,&nbsp;A.A. Sonzogni","doi":"10.1016/j.nds.2026.04.002","DOIUrl":"10.1016/j.nds.2026.04.002","url":null,"abstract":"<div><div>The integral gamma and electron spectra emitted by fission products, also known as delayed gamma and electron spectra, were measured at Oak Ridge National Laboratory in the 1970s for the thermal-neutron induced fission of ²³⁵U and ^239,241Pu. Scintillator detectors were used to measure these spectra, data used later on to obtain decay heat values - that is, the spectra mean values per unit time as function of time - work that was published in the Nuclear Science and Technology journal; the spectral data, however, was only published in laboratory reports. In this work, we analyze the gamma spectra data using modern methods and nuclear databases to reveal the signature of individual fission products as well as to gauge the performance of the ENDF/B-VIII.0 decay data sub-library, concluding about possible future enhancements in predictive capabilities.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"210 ","pages":"Pages 225-242"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827155","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}

{"title":"ENDF/B-VIII.1: Updated Nuclear Reaction Data Library for Science and Applications","authors":"G.P.A. Nobre ,&nbsp;R. Capote ,&nbsp;M.T. Pigni ,&nbsp;A. Trkov ,&nbsp;C.M. Mattoon ,&nbsp;D. Neudecker ,&nbsp;D.A. Brown ,&nbsp;M.B. Chadwick ,&nbsp;A.C. Kahler ,&nbsp;N.A. Kleedtke ,&nbsp;M. Zerkle ,&nbsp;A.I. Hawari ,&nbsp;C.W. Chapman ,&nbsp;N.C. Fleming ,&nbsp;J.L. Wormald ,&nbsp;K. Ramić ,&nbsp;Y. Danon ,&nbsp;N.A. Gibson ,&nbsp;P. Brain ,&nbsp;M.W. Paris ,&nbsp;R.Q. Wright","doi":"10.1016/j.nds.2026.04.001","DOIUrl":"10.1016/j.nds.2026.04.001","url":null,"abstract":"<div><div>The ENDF/B-VIII.1 library is the newest recommended evaluated nuclear data file by the Cross Section Evaluation Working Group (CSEWG) for use in nuclear science and technology applications, and incorporates advances made in the six years since the release of ENDF/B-VIII.0. Among key advances made are that the ²³⁹Pu file was reevaluated by a joint international effort and that updated ^16,18O, ¹⁹F, ^28–30Si, ^50–54Cr, ⁵⁵Mn, ^54,56,57Fe, ^63,65Cu, ¹³⁹La, ^233,235,238U, and ^240,241Pu neutron nuclear data from the IAEA coordinated INDEN collaboration were adopted. Over 60 neutron dosimetry cross sections were adopted from the IAEA's IRDFF-II library. In addition, the new library includes significant changes for ³He, ⁶Li, ⁹Be, ⁵¹V, ⁸⁸Sr, ¹⁰³Rh, ^140,142Ce, Dy, ¹⁸¹Ta, Pt, ^206–208Pb, and ^234,236U neutron data, and new nuclear data for the photonuclear, charged-particle and atomic sublibraries. Numerous thermal neutron scattering kernels were reevaluated or provided for the very first time. On the covariance side, work was undertaken to introduce better uncertainty quantification standards and testing for nuclear data covariances. The significant effort to reevaluate important nuclides has reduced bias in the simulations of many integral experiments with particular progress noted for fluorine, copper, and stainless steel containing benchmarks. Data issues hindered the successful deployment of the previous ENDF/B-VIII.0 for commercial nuclear power applications in high burnup situations. These issues were addressed by improving the ²³⁸U and ^239,240,241Pu evaluated data in the resonance region. The new library performance as a function of burnup is similar to the reference ENDF/B-VII.1 library. The ENDF/B-VIII.1 data are available in ENDF-6 and GNDS format at <span><span>https://doi.org/10.11578/endf/2571019</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"210 ","pages":"Pages 1-224"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827154","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}

{"title":"Nuclear Data Sheets Symbols and Abbreviations","authors":"","doi":"10.1016/S0090-3752(26)00032-3","DOIUrl":"10.1016/S0090-3752(26)00032-3","url":null,"abstract":"","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"210 ","pages":"Page IBC"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827124","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}

{"title":"Nuclear Data Sheets for A=261, 265","authors":"M. Gupta","doi":"10.1016/j.nds.2026.02.003","DOIUrl":"10.1016/j.nds.2026.02.003","url":null,"abstract":"<div><div>The Nuclear Data Sheets for A=261 (1999Ar21) and A=265 (1999Ar21) and a part of (2000Fi12) have been revised using experimental decay and reaction data received by January 1, 2018.</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"209 ","pages":"Pages 499-536"},"PeriodicalIF":2.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359846","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}

{"title":"Nuclear Structure and Decay Data for A=216 Isobars","authors":"C. Morse","doi":"10.1016/j.nds.2026.02.002","DOIUrl":"10.1016/j.nds.2026.02.002","url":null,"abstract":"<div><div>Experimental data from reaction and decay studies on nuclei with A=216 have been reviewed. Elements included in this review span from mercury (Z=80) to uranium (Z=92). Based on the published data, level and decay schemes are presented for the evaluated nuclides. This work updates and supersedes the previous A=216 evaluation (2007Wu02).</div></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":"209 ","pages":"Pages 409-498"},"PeriodicalIF":2.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147359848","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}