等效三体势对偶偶Ba与Xe同位素核的负宇称带的能谱研究

北京大学学报（自然科学版）

等效三体势对偶偶Ba与Xe同位素核的负宇称带的能谱研究

刘英太

北京大学技术物理系，北京，100871

收稿日期:2001-03-22 出版日期:2002-05-20 发布日期:2002-05-20

Study for the Negative Parity Energy Spectrum of Ba and Xe Isotopes Nuclei with Effective Three-body Potential

LIU Yingtai

Department of Technical Physics, Beijing University, Beijing, 100871

Received:2001-03-22 Online:2002-05-20 Published:2002-05-20

摘要/Abstract

摘要： 在s-d IBM1的O(6)极限下，引入d玻色子之间相互作用的等效三体势，考虑f玻色子产生的八极态，导出了负宇称态能谱解析表达式，并对过渡区^{118, 120}Xe和^{124, 126, 128, 130}Ba 6个偶偶核的负宇称带进行了能谱计算，得到了与实验能谱符合很好的结果，然后用Staggering指数定量分析了负宇称态能谱中的Staggering现象。

关键词: 等效三体势, 八极态, 能量Staggering

Abstract: Within the O(6) limit of s-d IBM1, the effective three-body potential between the interactions of d-bosons is introduced with the consideration of octupole states, which are produced by a f-boson plus (N-1) s-d. Then the analytic expressions of negative parity energy spectrum formula is obtained. Also the negative parity energy spectra of even-even nuclei ^{118, 120}Xe and ^{124, 126, 128, 130}Ba are calculated. The good fits with the experimental data are obtained, and Staggering phenomena is quantitatively analyzed with Staggering index formula in negative parity energy spectra.

Key words: effective three-body potential, octupole states, energy staggering

中图分类号:

O571.23

刘英太. 等效三体势对偶偶Ba与Xe同位素核的负宇称带的能谱研究[J]. 北京大学学报（自然科学版）.

LIU Yingtai. Study for the Negative Parity Energy Spectrum of Ba and Xe Isotopes Nuclei with Effective Three-body Potential[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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