A=245的核数据表

IF 2.8 1区 物理与天体物理 Q2 PHYSICS, NUCLEAR Nuclear Data Sheets Pub Date : 2023-06-01 DOI:10.1016/j.nds.2023.04.001
C.D. Nesaraja
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引用次数: 0

摘要

所有已知质量数为A=245的原子核的基态和激发态核结构的现有资料已经汇编和评估。给出了这些核素所采用的能级和衰变方案,以及基于实验数据的详细核性质和组态分配。当数据不足时,利用核性质系统学和(或)理论计算的期望值。意外的或不一致的实验结果也被注意到。自上次评价以来,在2014年4月16日,在244Pu(209Bi, 208Biγ)转移反应中观察到245Pu中的新旋转带具有高自旋。而在245Am, 2013Ah03的249Bk α衰变测量增加了一个基于π3/2[521]构型的新旋转带。245Pu β−衰变方案基本上是在60年代末提出的,47条γ射线仍然没有被放置。在245Cm处,用2015Ah03精确测量了249Cf α衰变的α能量和强度。他们报告的主α组的α能量比先前的评价低约2 keV。245e的引力体系的自旋和宇称仍然是模糊的,因为需要更多关于衰变的详细信息。通过Dubna和GSI基团的熔融蒸发反应生成249No,对其α衰变进行了研究,并发表了子代245Fm的一些性质,并纳入了本次评价。关于其他核素的资料很少,自上次评价以来也没有进行多少调查。在这一质量区域发现的各种核素的总结和汇编见:2013Fr02 (245Pu, 245Am, 245Cm, 245Bk, 245Cf), 2011Me01 (245Es)和2013Th02 (245Md, 245Fm)。
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Nuclear Data Sheets for A=245

Available information pertaining to the nuclear structure of ground and excited states for all known nuclei with mass numbers A=245 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. Since the last evaluation, new rotational bands in 245Pu have been observed to high spin from transfer reaction 244Pu(209Bi, 208Biγ) by 2014Ho16. While in 245Am, the 249Bk α decay measurements by 2013Ah03 added a new rotational band based on π3/2[521] configuration. The 245Pu β decay scheme is basically what was proposed in the late 60's and 47 γ rays have still not been placed. In 245Cm, precise alpha energies and intensities were measured by 2015Ah03 in 249Cf α decay. Their reported alpha energies of the main α group were about 2 keV lower than in the previous evaluation. The spin and parity of the g.s. of 245Es is still ambiguous as more detailed information on the decay is needed. With the production of 249No via fusion evaporation reaction by groups in Dubna and GSI, it's alpha decay was studied and some properties of the daughter 245Fm were published and included in this evalaution. Information on the other nuclides is scarce and not much has been investigated since the last evaluation. A summary and compilation of the discovery of the various nuclides in this mass region is given in: 2013Fr02 (245Pu, 245Am, 245Cm, 245Bk, 245Cf), 2011Me01 (245Es), and 2013Th02 (245Md, 245Fm).

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来源期刊
Nuclear Data Sheets
Nuclear Data Sheets 物理-物理:核物理
CiteScore
7.80
自引率
5.40%
发文量
22
审稿时长
>12 weeks
期刊介绍: The Nuclear Data Sheets are current and are published monthly. They are devoted to compilation and evaluations of experimental and theoretical results in Nuclear Physics. The journal is mostly produced from Evaluated Nuclear Structure Data File (ENSDF), a computer file maintained by the US National Nuclear Data Center
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