Strong-coupling Critical Point Symmetries for Axially-symmetric Odd-A Nuclei
-
摘要: 鉴于临界点对称性方法在描述原子核形状相变中的成功应用，在强耦合方案下对原有描述偶偶核球形到长椭形状相变的临界点对称性模型X（n）（n=3，4，5）进行扩展，据此建立描述轴对称奇A核系统的SX（n）临界点对称性。通过对X（n）模型与SX（n）模型的转动谱结构进行对比分析，揭示了SX（n）临界点模型的动力学结构受模型维数n的影响较小且更接近刚性转子的模型特征，这些模型特征进一步通过检验过渡区核素150，151，152，153Sm以及172，173，174，175Os中的相关转动带结构得到了初步证实。
In view of the successful application of the methods based on critical point symmetries (CPSs) in nuclear shape phase transitions, the new CPSs named SX(n) are established in this work for axially-symmetric odd-A nuclei through extending the original X(n) CPSs with n=3,4,5, which were used to describe the spherical to prolate shape phase transitions in even-even nuclei, in the strong-coupling scheme. By comparing the spectral structures in between the X(n) and the SX(n) CPSs, it is revealed that the dynamical structures of SX(n) are closer to the rigid rotor and less changed with the model dimension in comparison with X(n). Moreover, these features of SX(n) are preliminarily verified by checking the rotational structures of 150,151,152,153Sm and 172,173,174,175Os nuclei.Abstract: In view of the successful application of the methods based on critical point symmetries (CPSs) in nuclear shape phase transitions, the new CPSs named SX(n) are established in this work for axially-symmetric odd-A nuclei through extending the original X(n) CPSs with n=3,4,5, which were used to describe the spherical to prolate shape phase transitions in even-even nuclei, in the strong-coupling scheme. By comparing the spectral structures in between the X(n) and the SX(n) CPSs, it is revealed that the dynamical structures of SX(n) are closer to the rigid rotor and less changed with the model dimension in comparison with X(n). Moreover, these features of SX(n) are preliminarily verified by checking the rotational structures of 150,151,152,153Sm and 172,173,174,175Os nuclei.-
Key words:
- shape phase transition /
- critical point symmetry /
- strong coupling /
- collective model
-
[1] IACHELLO F. Physical Review Letter, 2000, 85:3580. [2] IACHELLO F. Physical Review Letter, 2001, 87:052502. [3] CASTEN R F, ZAMFIR N V. Physical Review Letter, 2000, 85:3584. [4] CASTEN R F, ZAMFIR N V. Physical Review Letter, 2001, 87:052503. [5] CLARK R M, MACCHIAVELLI A O, FORTUNATO L, et al. Physical Review Letter 2006, 96:032501. [6] ZHANG Yu, PAN Feng, LIU Yuxin, et al. Journal of Physics B, 201043:225101. [7] ZHANG Yu, HOU Zhanfeng, CHEN Huan, et al. Physical Review C, 2008, 78:024314. [8] BONATSOS D, LENIS D, PETRELLIS D, et al. Physics Letter B, 2005621:102. [9] BONATSOS D, LENIS D, PETRELLIS D, et al. Physics Letter B, 2006632:238. [10] BUDACA R, BUDACA A I. Physics Letter B, 2016759:349. [11] ZHANG Yu, PAN Feng, LIU Yuxin, et al. Physical Review C, 2017, 96:034323. [12] IACHELLO F. Physical Review Letter, 2005, 95:052503. [13] ALONSO C E, ARIAS J M, VITTURI A. Physical Review Letter, 2007, 98:052301. [14] ZHANG Yu, PAN Feng, LIU Yuxin, et al. Physical Review C, 2010, 82:034327. [15] ZHANG Yu, PAN Feng, LIU Yuxin, et al. Physical Review C, 2011, 84:054319. [16] NILSSON S G, RAGNARSSON I. Shapes and Shells in Nuclear Structure[M]. Cambridge:Cambridge University Press, England, 1995. [17] GREINER W, MARUHN J A. Nulcear Models[M]. SpringerVerlag, Berlin, 1996. [18] LI Qiuyue, WANG Xiaoxia, ZUO Yan, et al. Chinese Physics C, 2016, 40:014101. [19] DER MATEOSIAN E, TULI T K. Nuclear Data Sheets, 1995, 75:827. [20] ARTNA-COHEN A. Nuclear Data Sheets, 1996, 79:1. [21] SINGH B. Nuclear Data Sheets, 1997, 80:263. [22] HELMER R G. Nuclear Data Sheets, 2006, 107:507. [23] CASTEN R F, MCCUTCHAN E A. Journal of Physics G, 200734:R285. [24] SINGH B. Nuclear Data Sheets, 1995, 75:199. [25] SHIRLEY V S. Nuclear Data Sheets, 1995, 75:377. [26] BROWNE E, JUNDE H. Nuclear Data Sheets, 1999, 87:15. [27] BASUNIA M S. Nuclear Data Sheets, 2004, 102:719. [28] ZHANG Yu, PAN Feng, LIU Yuxin, et al. Physical Review C, 2013, 88:014304. [29] ZHANG Yu, PAN Feng, LUO Yanan, et al. Physical Review C, 2012, 86:044312. -
点击查看大图
计量
- 文章访问数: 1015
- HTML全文浏览量: 109
- PDF下载量: 118
- 被引次数: 0
下载:
甘公网安备 62010202000723号