Study of the Giant Gamow-Teller Resonance in Nuclear Beta-Decay - the Case of Ar-32
Journal article, 1985
Delayed proton and gamma emissions following the β-decay of 32Ar have been studied. The half-life of 32Ar is 98 ± 2 ms, and the T = 2 analogue state in 32Cl lies at the excitation energy 5036 ± 12 keV. From the intensity of the feeding to this state the proton intensities can be converted to an absolute scale leading to a total proton branching ratio of (43 ± 3)%. From proton-gamma coincidence measurements it emerges that (1.9 ± 0.2)% of the protons lead to the first-excited state in 31S. A level scheme up to 8.75 MeV excitation in 32Cl has been constructed and the Gamow-Teller strength function has been deduced. The result is a renormalization of the axial-vector strength to (49 ± 5)% of the free-nucleon value.
Author
T. Bjornstad
M. J. G. Borge
P. Dessagne
R. D. Vondincklage
G. T. Ewan
P. G. Hansen
A. Huck
Björn Jonson
Department of Physics
G. Klotz
A. Knipper
P. O. Larsson
Göran Hugo Nyman
Department of Physics
H. L. Ravn
C. Richardserre
K. Riisager
D. Schardt
G. Walter
Nuclear Physics A
0375-9474 (ISSN)
Vol. 443 2 283-301Subject Categories
Subatomic Physics
DOI
10.1016/0375-9474(85)90264-7