在稀土区奇奇核πh11/2(×)νi13/2转动带中, 系统地观测到随转动频率或角动量增加, B(M1)/B(E2)曲线表现出所谓parabola-like形状, 即在增加到某一转动频率或自旋后, B(M1)/B(E2)比值快速增强. 基于推转模型和粒子转子模型关于奇奇核二准粒子转动带磁偶极约化跃迁几率的描述, 对稀土区双奇核的这一行为进行了讨论. 指出该现象的发生与νi13/2准中子转动顺排特性密切相关. B(M1)/B(E2)比值在接近第二带交叉(即BC准中子对顺排)的较高频率处的增强效果, 可以理解为主要来源于带交叉引起的波函数中混合四准粒子成分的结果. 通过对B(M1)/B(E2)比值的增强效果发生在较低频率处的分析, 对稀土区奇奇核πh11/2(×)νi13/2带角动量耦合图像有了进一步认识.
参考文献
[1] | Ring P, Hayashi A, Hara K, et al. Phys Lett, 1982, B110: 423. |
[2] | Hamamoto I, Mottelson B R. Phys Lett, 1983, B132: 7. |
[3] | Hamamoto I. Phys Lett, 1981, B102: 225; 1981, B106: 281. |
[4] | Smith A G, Chapman R, Clarke D C, et al. Nucl Phys, 1995, A587: 150. |
[5] | Hartley D J, Brown T B, Kondev F G, et al. Phys Rev, 1998, C58: 2 720. |
[6] | Roux D G, Fetea M S, Gueorguieva E, et al. Phys Rev, 2001, C63: 024303. |
[7] | Fetea M S, Fetea R F. Nucl Phys, 2001, A690: 239c. |
[8] | Liang Y S, Wu X J, Xu J Z, et al. Phys Rev, 1999, C60: 054305. |
[9] | Larabee A J, Courtney L H, Frauendorf S, et al. Phys Rev, 1984, C29: 1 934. |
[10] | Hamamoto I, Mottelson B R. Phys Lett, 1986, B167: 370. |
[11] | Salicio J L, Délèze M, Drissi S, et al. Nucl Phys, 1990, A512: 109. |
[12] | Drissi S, Bruder A, Carlen M, et al. Nucl Phys, 1992, A543: 495. |
[13] | Drissi S, Li Z P, Dlèze M, et al. Nucl Phys, 1996, A600: 63. |
[14] | Cardona M A, Davidson J, Hojman D, et al. Phys Rev, 1997, C56: 707. |
[15] | Roux D G, Gueorguieva E, Babu B R S, et al. Phys Rev, 2001, C65: 014308. |
[16] | Lu J B, Liu Y Z, Wu X G, et al. Phys Rev, 1999, C59: 3 461. |
[17] | Lu Jingbin, Sun L, Yang D, et al. to be submitted. |
[18] | Hamamoto I, Mottelson B R. Phys Lett, 1983, B132: 7. |
[19] | Hageman G B, Garrett J D, Herskind B, et al. Nucl Phys, 1984, A424: 365. |
[20] | Espino J M, Hagemann G B, Bearden I G, et al. Nucl Phys, 1998, A640: 163. |
[21] | Cardona M A, Hojman D, Devray M E, et al. Phys Rev, 2002, C66: 044308. |
[22] | Donau F, Frauendorf S. Proceedings of the Conference on High Angular Momentum Properties of Nuclei. Edited by Johnson N. New York: Harwood, 1983, 143. |
[23] | Bark R A, Carlsson H, Freeman S J, et al. Nucl Phys, 1998, A630: 603. |
[24] | Jensen H J, Bark R A, Tjm T O, et al. Nucl Phys, 2001, A695: 3. |
[25] | Carlsson H, Bark R A, Ekstrōm L P, et al. Nucl Phys, 1995, A592: 89. |
[26] | Hojman D, Cardona M A, Davidson M, et al. Phys Rev, 2000, C61: 064322. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%