LARGE B(M1) STAGGERING AT HIGH SPINS IN ZR-86 - BROKEN BOSON PAIRS IN THE 4-QUASI-PARTICLE REGIME

被引：38

作者：

CHOWDHURY, P

LISTER, CJ

VRETENAR, D

WINTER, C

JANZEN, VP

ANDREWS, HR

BLUMENTHAL, DJ

CROWELL, B

DRAKE, T

ENNIS, PJ

GALINDOURIBARRI, A

HORN, D

JOHANSSON, JK

OMAR, A

PILOTTE, S

PREVOST, D

RADFORD, D

WADDINGTON, JC

WARD, D

机构：

[1] UNIV ZAGREB, FAK PRIRODOSLOVNO MATEMAT, YU-41000 ZAGREB, CROATIA

[2] ATOM ENERGY CANADA LTD, CHALK RIVER NUCL LABS, CHALK RIVER K0J 1J0, ONTARIO, CANADA

[3] MCMASTER UNIV, TANDEM ACCELERATOR LAB, HAMILTON L8S 4K1, ONTARIO, CANADA

[4] UNIV TORONTO, TORONTO M5S 1A7, ONTARIO, CANADA

[5] UNIV MONTREAL, PHYS NUCL LAB, MONTREAL H3C 3J7, QUEBEC, CANADA

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.67.2950

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The transitional nucleus Zr-86 has been studied by the Ni-60(Si-30,2p2n) reaction, with gamma-gamma-coincidence, angular correlation, and Doppler-shift-attenuation measurements. Band structures exhibiting strongly staggered M1 transition rates were found at high spins, with large B(M1) values but no significant E2 collectivity. The unusual behavior of this nucleus is interpreted within the framework of an interacting boson model incorporating two broken boson pairs. This new model for high-spin states is seen to be remarkably successful in describing the electromagnetic decay properties in the four-quasiparticle regime.

引用

页码：2950 / 2953

页数：4

共 22 条

[1] INTERACTING BOSON MODEL OF COLLECTIVE NUCLEAR-STATES .4. O(6) LIMIT [J].