Large asymmetry in the strongest β-transition for A=9

被引：32
作者：
Prezado, Y
Bergmann, UC
Borge, MJG
Cederkäll, J
Diget, CA
Fraile, LM
Fynbo, HOU
Jeppesen, H
Jonson, B
Meister, M
Nilsson, T
Nyman, G
Riisager, K
Tengblad, O
Weissmann, L
Rolander, KW
机构：
[1] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain
[2] CERN, Div EP, CH-1211 Geneva 23, Switzerland
[3] Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus C, Denmark
[4] Chalmers Tekn Hogskola, S-41296 Gothenburg, Sweden
[5] Univ Stockholm, Inst Fys, S-11385 Stockholm, Sweden
来源：
PHYSICS LETTERS B | 2003年 / 576卷 / 1-2期
关键词：
Li-9(beta(-)[from UC(p; X)]); measured beta-delayed E-alpha; alpha alpha-coinc; Be-9 deduced beta-branching strengths; A=9 beta-decay asymmetry;
D O I：
10.1016/j.physletb.2003.09.073
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A new measurement of the beta-decay of Li-9 has clarified the feeding to the highest accessible states in Be-9. It is found that the P-decay mainly populates the 11.8 MeV state, whose spin is determined as 5/2(-). The extracted B-GT value of 5.3(0.9) is a factor 4.4(1.0) larger than that of the mirror transition from C-9. A theoretical explanation of such a pronounced beta-decay asymmetry is presently lacking. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：55 / 61
页数：7
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