非常缺中子 Re核的负三轴形变研究

原子核物理评论 , 2004, 21(4): 326-330. doi: 10.3969/j.issn.1007-4627.2004.04.017

非常缺中子 Re核的负三轴形变研究

周小红 ^1, , 张玉虎 ^2, , 宋立涛 ^3, , 郑勇 ^4, , 徐岩冰 ^5,

1.中国科学院近代物理研究所,甘肃,兰州,730000

2.中国科学院近代物理研究所,甘肃,兰州,730000

3.中国科学院近代物理研究所,甘肃,兰州,730000

4.中国科学院近代物理研究所,甘肃,兰州,730000

5.中国科学院近代物理研究所,甘肃,兰州,730000

基金项目: 国家自然科学基金(10005012)

关键词：三轴形变 , 旋称劈列 , 奇A核

Triaxial Deformation in very Neutron-deficient Re Nuclei

Keywords： tiaxial deformation , signature splitting , odd-A nuclei

利用在束核谱学实验技术, 建立了169Re基于9/2-[514]组态的强耦合转动带. 该带在已知的奇A Re核中具有最大的低自旋旋称劈列. 对于奇A Re中的9/2-[514]转动带, 研究了它们的能量旋称劈列和M1跃迁矩阵元相对旋称劈列与核形状偏离轴对称的关系, 揭示了非常缺中子的奇A Re核具有相当的负三轴形变.

High-spin states in 169Re were studied and resulted in the identification of a strongly coupled band based on the 9/2-[514] Nilsson state. The 9/2-[514] band in 169Re shows the largest signature splitting at low spin among the known odd mass Re isotopes. For the 9/2-[514] bands in light odd-A Re isotopes, the signature splitting of the Routhians and its relation with the signature dependence of M1 transition matrix elements are investigated in connection with the deviation of nuclear shape from axial symmetry, suggesting an appreciable negative γ deformation at low spin for the very neutron-deficient odd-A Re isotopes.

参考文献

[1]	Roux D G, Fetea M S, Gueorguieva E, et al. Phys Rev, 2001, C63: 024303.
[2]	Bark R A, Dracoulis G D, Stuchbery A E, et al. Nucl Phys, 1989, A501: 157.
[3]	Carlsson H, Bergstrom M, Brockstedt A, et al. Nucl Phys, 1993, A551: 295.
[4]	Hildingsson L, Klamra W, Lindblad T, et al. Nucl Phys, 1990, A513: 394.
[5]	Bengtsson R, Frauendorf S. Nucl Phys, 1979, A324: 27.
[6]	Bengtsson R, Frauendorf S. Nucl Phys, 1979, A327: 139.
[7]	Bark R A, Dracoulis G D. Stuchbery A E. Nucl Phys, 1990, A514: 503.
[8]	Kibedi T, Dracoulis G D, Fabricius B, et al. Nucl Phys, 1992, A539: 137.
[9]	Furuno K, Oshima M, Komatsubara T, et al. Nucl Instr and Meth, 1999, A421: 211.
[10]	Schmidt-Ott W D, Salewski H, Meissner F, et al. Nucl Phys, 1992, A545: 646.
[11]	Zhang Y H, Hayakawa T, Oshima M, et al. Phys Rev, 2002, C65: 014302.
[12]	Mueller W F, Jensen H J, Reviol W, et al. Phys Rev, 1994, C50: 1 901.
[13]	Mueller W F, Jin H Q, Lewis J M, et al. Phys Rev, 1999, C59: 2 009.
[14]	Yu C H, Hagemann G B, Espino J M, et al. Nucl Phys, 1988, A489: 477.
[15]	Hagemann G B, Hamamoto I. Phys Rev, 1989, C40: 2 862.
[16]	Bengtsson R, Frisk H, May F R, et al. Nucl Phys, 1984, A415: 189.

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