The beta 2p decay mechanism of Ar-31
Artikel i vetenskaplig tidskrift, 2000

We have measured the beta-decay of Ar-31 with a high granularity setup sensitive to multiparticle decay branches. Two-proton emission is observed from the isobaric analog state in Cl-31 to the four lowest states in P-29 and furthermore from a large number of states fed in Gamow-Teller transitions. The mechanism of two-proton emission is studied via energy and angular correlations between the two protons. In all cases the mechanism is found to be sequential yielding information about states in S-30 up to 8 MeV excitation energy. Improved data on the beta-delayed one-proton branches together with the two-proton data provide precise information about the beta-strength distribution up to 15 MeV excitation energy.

ar-31(beta(+)(p)) [from ca(p

t

pp energy and angular correlations

radioactivity

double sided si strip detector

on-line mass separation

cao target

branching ratios

s-30

ar-31 deduced beta 1p and beta 2p decay channels

ca-35

si p-i-n detectors

measured beta-delayed protons e-p

3pxn) reaction]

delayed 2-proton emission

modes

nuclei

be-6

surface barrier si detector

cl-31 deduced levels

pi

al-22

e-2p

proton emission

Författare

H. O. U. Fynbo

M. J. G. Borge

Leif Axelsson

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

J. Aysto

U. C. Bergmann

L. M. Fraile

A. Honkanen

P. Hornshoj

Y. Jading

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

M. Oinonen

I. Piqueras

K. Riisager

T. Siiskonen

Martin Smedberg

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

O. Tengblad

J. Thaysen

Fredrik Wenander

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

Nuclear Physics A

0375-9474 (ISSN)

Vol. 677 38-60

Ämneskategorier

Subatomär fysik