Large asymmetry in the strongest beta-transition for A=9
Journal article, 2003
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.
measured beta-delayed E-alpha
HE-8
asymmetry
Li-9(beta(-)[from UC(p
A=9 beta-decay
alpha-coinc
alpha
LI-9
NUCLEAR
DECAY
X)])
Be-9 deduced beta-branching strengths
Author
Y. Prezado
U. C. Bergmann
M. J. G. Borge
J. Cederkall
C. A. Diget
L. M. Fraile
H. O. U. Fynbo
H. B. Jeppesen
Björn Jonson
Chalmers, Department of Experimental Physics, Subatomic Physics
Mikael Meister
Thomas Nilsson
Göran Hugo Nyman
Chalmers, Department of Experimental Physics, Subatomic Physics
K. Riisager
O. Tengblad
L. Weissmann
Katarina Wilhelmsen Rolander
Chalmers, Department of Experimental Physics, Subatomic Physics
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 576 1-2 55-61Subject Categories
Subatomic Physics
DOI
10.1016/j.physletb.2003.09.073