Shape evolution in heavy sulfur isotopes and erosion of the N=28 shell closure
Shape evolution in heavy sulfur isotopes and erosion of the N=28 shell closure
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DOI：
10.1103/physrevc.66.054302
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发表时间：
2002-11
影响因子：
3.1
通讯作者：
D. Sohler;Z. Dombrádi;J. Timár;O. Sorlin;F. Azaiez;F. Amorini;M. Belleguic;C. Bourgeois;C. Donzaud;J. Duprat;D. Guillemaud-Mueller;F. Ibrahim;J. Scarpaci;M. Stanoiu;M. J. López;M. Saint-Laurent;F. Becker;F. Sarazin;C. Stodel;G. Voltolini;S. Lukyanov;V. Maslov;Y. Penionzhkevich;M. Girod;S. Péru;F. Nowacki;G. Sletten;R. Lucas;C. Theisen;D. Baiborodin;Z. Dlouhý;J. Mrázek;C. Borcea;A. Bauchet;C. Moore;M. Taylor
中科院分区：
文献类型：
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作者：
D. Sohler;Z. Dombrádi;J. Timár;O. Sorlin;F. Azaiez;F. Amorini;M. Belleguic;C. Bourgeois;C. Donzaud;J. Duprat;D. Guillemaud-Mueller;F. Ibrahim;J. Scarpaci;M. Stanoiu;M. J. López;M. Saint-Laurent;F. Becker;F. Sarazin;C. Stodel;G. Voltolini;S. Lukyanov;V. Maslov;Y. Penionzhkevich;M. Girod;S. Péru;F. Nowacki;G. Sletten;R. Lucas;C. Theisen;D. Baiborodin;Z. Dlouhý;J. Mrázek;C. Borcea;A. Bauchet;C. Moore;M. Taylor
利用 60 MeV A Ca 束在薄 Be 靶上的碎裂反应，通过束内 g 射线光谱研究了富中子 S 核的结构。对每个产生的碎片测量了 Eg 、 Ig 、 gg 重合和 g 射线角分布。先前仅包含单个 g 跃迁的能级方案得到了扩展，并为新状态提出了自旋值。通过使用微观集体模型和大规模壳模型计算来解释实验结果。模型计算结果相互吻合，对实验结果给出了合理的描述。两个模型都预测 N528 壳封闭在 Z516 处的侵蚀，并提出 S 的变形基态和 S 的球形变形混合配置。
The structure of neutron-rich S nuclei has been investigated through in-beam g-ray spectroscopy using the fragmentation reaction of a 60 MeV A Ca beam on a thin Be target. Eg , Ig , gg-coincidence, and g-ray angular distributions were measured for each produced fragment. The level schemes previously containing only a single g transition were extended, and spin values were proposed for the new states. The experimental results were interpreted by use of microscopic collective-model and large-scale shell-model calculations. The results of the model calculations are consistent with each other, and give a reasonable description of the experimental results. Both models predict an erosion of the N528 shell closure at Z516 and suggest a deformed ground state for S and a spherical-deformed mixed configuration for S.