Two-proton emission in the decay of Ar-31
Journal article, 1998
Several beta-delayed two-proton branches were observed in the decay of Ar-31, the most intense ones proceeding through the isobaric analogue state (IAS) in Cl-31. The mechanism of the two-proton emission is studied via the energy and angular distributions of the two protons, Simultaneous emission of the two protons fits the present data well, sequential decays might also describe them. Independent of the decay mechanism, a spin of 5/2 for the IAS is suggested, An improved limit on the direct two-proton emission fi om the ground state of Ar-31 is presented, (C) 1998 Elsevier Science B.V.
NUCLEI
DELAYED 2-PROTON EMISSION
3-PARTICLE DECAYS
target
BE-6
radioactivity Ar-31(beta(+)p) [from Ca(p
on-line mass separation
CaO
3pxn) reaction]
pp-coin
Ar-31 deduced beta 2p-decay channels
AL-22
SYSTEMATICS
beta-delayed E-p
measured
surface barrier Si detectors
Author
L. Axelsson
J. Aysto
U. C. Bergmann
M. J. G. Borge
L. M. Fraile
H. O. U. Fynbo
A. Honkanen
P. Hornshoj
A. Jokinen
Björn Jonson
Chalmers, Department of Experimental Physics, Subatomic Physics
I. Martel
I. Mukha
Thomas Nilsson
Göran Hugo Nyman
Chalmers, Department of Experimental Physics, Subatomic Physics
B. Petersen
K. Riisager
Martin Smedberg
Chalmers, Department of Experimental Physics, Subatomic Physics
O. Tengblad
Nuclear Physics A
0375-9474 (ISSN)
Vol. 628 3 345-362Subject Categories
Subatomic Physics
DOI
10.1016/S0375-9474(97)00623-4