Two-proton emission in the decay of Ar-31
Artikel i vetenskaplig tidskrift, 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

Författare

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, Institutionen för experimentell fysik, Subatomär fysik

I. Martel

I. Mukha

Göran Hugo Nyman

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

B. Petersen

K. Riisager

Martin Smedberg

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

O. Tengblad

Nuclear Physics A

0375-9474 (ISSN)

Vol. 628 3 345-362

Ämneskategorier

Subatomär fysik

DOI

10.1016/S0375-9474(97)00623-4