COMPETING PROTON AND NEUTRON ROTATIONAL ALIGNMENTS - BAND STRUCTURES IN BA-131

被引：26

作者：

MA, R ^{[1
]}

LIANG, Y ^{[1
]}

PAUL, ES ^{[1
]}

XU, N ^{[1
]}

FOSSAN, DB ^{[1
]}

HILDINGSSON, L ^{[1
]}

WYSS, RA ^{[1
]}

机构：

[1] MANNE SIEGBAHN INST PHYS, S-10405 STOCKHOLM 50, SWEDEN

来源：

PHYSICAL REVIEW C | 1990年 / 41卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.41.717

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

High-spin states in the odd-neutron Ba131 nucleus have been populated following the Sn122(13C,4n) reaction. Several rotational bands were established using - coincidence techniques. The yrast band, built on a h11/2 orbital, has a relatively large signature splitting (160 keV). Cranking calculations suggest a significant triaxial shape with 0°for this configuration. A pair of h11/2 protons align at a rotational frequency Latin small letter h with stroke0.43 MeV and drive the nucleus towards a near-prolate shape (0°), which is manifest by the observation of a I=1 band with strong dipole transitions and a small signature inversion. At a similar frequency, pairs of h11/2 neutrons align and drive the nucleus to near-oblate (-60°) shapes, resulting in the observation of decoupled I=2 bands. © 1990 The American Physical Society.

引用

页码：717 / 729

页数：13

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