Asymmetry in the super-allowed beta-transitions of the A=9 isobars
Journal article, 2004

We report here on the recent beta-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in Be-9 (11.8 MeV) and B-9 (12.2 MeV) fed in the beta-decay of Li-9 and C-9 respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.

LI-9

DECAY

SCATTERING

BE-9

Author

M. J. G. Borge

U. Prezado

U. C. Bergmann

R. Boutami

J. Cederkall

C. A. Diget

L. M. Fraile

H. O. U. Fynbo

Y. Jading

H. B. Jeppesen

Björn Jonson

Chalmers, Department of Experimental Physics, Subatomic Physics

I. Martel

Mikael Meister

Thomas Nilsson

Göran Hugo Nyman

Chalmers, Department of Experimental Physics, Subatomic Physics

K. Riisager

H. Simon

O. Tengblad

L. Weissman

Fredrik Wenander

Katarina Wilhelmsen

Chalmers, Department of Experimental Physics, Subatomic Physics

Nuclear Physics A

0375-9474 (ISSN)

Vol. 738 206-210

Subject Categories

Subatomic Physics

DOI

10.1016/j.nuclphysa.2004.04.074

More information

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7/4/2018 1