62-76Zn核的低能谱和电磁跃迁的相互作用玻色子模型

原子核物理评论 , 2003, 20(3): 176-181. doi: 10.3969/j.issn.1007-4627.2003.03.002

62-76Zn核的低能谱和电磁跃迁的相互作用玻色子模型

白洪波 ^1, , 刘凤英 ^2, , 李岩松 ^3, , 周光荣 ^4, , 张进富 ^5,

1.赤峰学院物理系,内蒙古,赤峰,024001;清华大学物理系,北京,100084

2.清华大学物理系,北京,100084

3.清华大学物理系,北京,100084

4.清华大学物理系,北京,100084

5.赤峰学院物理系,内蒙古,赤峰,024001;清华大学物理系,北京,100084

基金项目: 内蒙古教育厅资助项目(ZD01038) 国家自然科学基金(10047001,10265001) 国家重点基础研究发展计划(973计划)(G200077400) 教育部霍英东教育基金教育部优秀青年教师资助计划

关键词：能谱 , 电磁跃迁 , 正宇称集体态

Low-lying Spectra and E2 Transition Rates in Even-even 62-76Zn Isotopes in Interaction Boson Model

Keywords： enevgy spectrum , electromagnetic transition , positive parity collective state

采用相互作用玻色子模型研究了62-76Zn核的低能正宇称态的能谱和电磁跃迁. 应用一个简单的哈密顿量能够较好地描述它们的能谱和电四极跃迁. 研究表明, 62-76Zn同位素核基本上属于U(5)到O(6)的过渡核.

Spectra and E2 transition rates for the even-even 62-76Zn isotopes are studied in the framework of the interacting boson model. A schematic Hamiltonian capable of describing their spectra and transition is used. It is found that the even-even 62-76Zn isotopes are in the transition from U(5) to O(6) dynamical symmetry.

参考文献

[1]	Petrovici A, Amand Faessler. Two-quasiparticle Admixtures and the Asymmetric Rotor Model in Ge and Zn Isotopes[J]. Nucl Phys, 1983, A395: 44.
[2]	Devlin M, fanasjev A V A, Clark R M, et al. Superdeformation in 68Zn: Evidence for a new, neutron-rich island of superdeformation in A ≈70 nuclei[J]. Phys Rev Lett, 1999, 82: 5 217.
[3]	Mukherjee B, Muralithar S, Singh P R, et al. Two-proton Alignment and Shape Changes in 65Zn[J]. Phys Rev, 1997, C55: 024304-1.
[4]	Sun Yang , Zhang Jingye , Guidry Mike , et al. Theoretical Constraints for Observation of Superdeformed Bands in the Mass-60 Region[J]. Phys Rev Lett, 1999, 83: 686.
[5]	Kenn O, Speidel K H, Ernst R, et al. Measurements of g Factors and Lifetimes of Low-lying States in 62-70Zn and Their Shell Model Implication[J]. Phys Rev, 2002, C65: 034308-1.
[6]	Svensson C E, Baktash C, Ball G C, et al. Smooth Termination of Rotational Band in 62Zn: Evidence for a loss of collectivity[J]. Phys Rev Lett, 1998, 80: 2 558.
[7]	Daugas J M, Grzywacz R, Lewitowicz M, et al. The 8+ Isomer in 78Zn and the Doubly Magic Character of 78Ni[J]. Phys Lett, 2000, B476: 213.
[8]	Iachello F, Arima A. The Interacting Boson Model[M]. Combridge: Combridge University Press, 1987.
[9]	Zhang Jinfu, Pak Jaeyon, Liu Fengying. Low-lying Spectra and E2 Transition Rates in Even-even Ce Isotopes in the Interacting Boson Model[J]. HEP & NP (in Chinese), 2000, 24(11): 1 066.
[10]	Scholten O. The Program Package PHINT[Z]. Kernfysisch Versneller Instituut, Zernikelaan 25 9747 AA Groningen Netherlands.
[11]	Warner D D, Casten R F. Reviced Formulation of the Phenomenological Interacting Boson Approximation[J]. Phys Rev Lett, 1982, 48: 1 385.
[12]	Chu S Y, Nordberg H, Firestone R B, et al. Isotopes Explorer 2.00[Z]. 1998.
[13]	Long G L. Collective Backbending Effect in IBM[J]. Phys Rev, 1997, C55: 3 163.
[14]	Long Guilu, Li Yansong, Tu Changcun, et al. Mixed Symmetry Isomeric States in Nuclei[J]. Commun Theor Phys, 2002, 37(1): 75.
[15]	Stachel J, Isacker P Van, Heyde K. Interpretation of the A ≈ 100 Transitional Region in the Framework of the Interavting Boson Model[J]. Phys Rev, 1982, C25: 650.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网