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Shape Co-Existence in the Transitional Nuclide 157yb
  • ISSN号：1009-0630
  • 期刊名称：《等离子体科学与技术：英文版》
  • 时间：0
  • 分类：O571.22[理学—粒子物理与原子核物理;理学—物理] TN248.6[电子电信—物理电子学]
  • 作者机构：[1]School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University, Beijing 100871, China, [2]ChinaInstitute of Atomic Energy, Beijing 102413, China
  • 相关基金：supported by Natural Science Foundation of China （Nos. 10775005, 10405001, 10875002, 10735010, 10975007, 10875157, J0730316） and the Chinese Major State Basic Research Development Program （No. 2007CB815002）
作者： 徐川[1], 华辉[1], 李湘庆[1], 张双全[1], 许甫荣[1], 石跃[1], 竺礼华[2], 吴晓光[2], 李广生[2], 贺创业[2]
关键词： 形状共存, 电子束能量, 核素, 熔合蒸发反应, 高自旋态, 转子模型, 实验数据, 结构特征, 157Yb, shape coexistence, shape evolution, triaxial particle-rotor model Tot al- Rout hi an- Surface
中文摘要：

High-spin states in 157yb have been populated in the 144Sm(16O, 3n)157yb fusion-evaporation reaction at a beam energy of 85 MeV, and two rotational bands have been established for the first time. Within the framework of the triaxial particle-rotor model, the energy spectra and single-particle configurations of 157yb are investigated. The calculated energy spectra agree well with the experimental data. The newly observed vf7/2 band, and the previously known vi13/2 band in 157yb, are also discussed by means of Total-Routhian-Surface methods. The structural characters observed in 157Yb provide evidence for the shape coexistence of three distinct shapes: prolate, triaxial and oblate. At higher spins, both the vf7/2 band and the vi13/2 band in 157yb undergo a shape evolution with sizable alignments occurring.

英文摘要：

High-spin states in 157Yb have been populated in the 144Sm（160, 3n）157yb fusion- evaporation reaction at a beam energy of 85 MeV, and two rotational bands have been established for the first time. Within the framework of the triaxial particle-rotor model, the energy spectra and single-particle configurations of 157Yb are investigated. The calculated energy spectra agree well with the experimental data. The newly observed vf7/2 band, and the previously known vi13/2 band in 157Yb, are also discussed by means of Total-Routhian-Surface methods. The structural characters observed in 157Yb provide evidence for the shape coexistence of three distinct shapes： prolate, triaxial and oblate. At higher spins, both the vf7/2 band and the vi13/2 band in 157Yb undergo a shape evolution with sizable alignments occurring.

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期刊信息
  • 《等离子体科学与技术：英文版》
  • 主管单位:中国科学院 中国科协
  • 主办单位:中国科学院等离子体物理研究所 中国力学学会
  • 主编：万元熙、谢纪康
  • 地址：合肥市1126信箱
  • 邮编：230031
  • 邮箱：pst@ipp.ac.cn
  • 电话：0551-5591617 5591388
  • 国际标准刊号：ISSN：1009-0630
  • 国内统一刊号：ISSN：34-1187/TL
  • 邮发代号:
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  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,美国科学引文索引（扩展库）,英国科学文摘数据库
  • 被引量:89