Large asymmetry in the strongest beta-transition for A=9
Artikel i vetenskaplig tidskrift, 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
Författare
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, Institutionen för experimentell fysik, Subatomär fysik
Mikael Meister
Thomas Nilsson
Göran Hugo Nyman
Chalmers, Institutionen för experimentell fysik, Subatomär fysik
K. Riisager
O. Tengblad
L. Weissmann
Katarina Wilhelmsen Rolander
Chalmers, Institutionen för experimentell fysik, Subatomär fysik
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 576 1-2 55-61Ämneskategorier
Subatomär fysik
DOI
10.1016/j.physletb.2003.09.073