Multiparticle emission in the decay of Ar-31
Artikel i vetenskaplig tidskrift, 2014

A multihit capacity setup was used to study the decay of the dripline nucleus Ar-31, produced at the ISOLDE facility at CERN. A spectroscopic analysis of the beta-delayed three-proton decay of Ar-31 is presented for the first time together with a quantitative analysis of the beta-delayed 2p gamma decay. A new method for determination of the spin of low-lying levels in the beta p daughter 30S using proton-proton angular correlations is presented and used to determine that the spin of the 5.2-MeV level is most likely 3(+) with 4(+) also possible. The half-life of Ar-31 is found to be 15.1(3) ms. An improved analysis of the Fermi beta strength including the beta 3p-decay mode gives a total measured branching ratio of 3.60(44)%, which is lower than the theoretical value found to be 4.24(43)%. Finally, a previously unidentified. transition from the isobaric analog state in the decay of Ar-33 has been found.


G. T. Koldste

B. Blank

M. J. G. Borge

J. A. Briz

M. Carmona-Gallardo

L. M. Fraile

H. O. U. Fynbo

J. Giovinazzo

B. D. Grann

J. G. Johansen

A. Jokinen

Björn Jonson

Chalmers, Fundamental fysik

T. Kurturkian-Nieto

J. H. Kusk

Thomas Nilsson

Chalmers, Fundamental fysik

A. Perea

V. Pesudo

E. Picado

K. Riisager

A. Saastamoinen

O. Tengblad

J. C. Thomas

J. Van de Walle

Physical Review C - Nuclear Physics

24699985 (ISSN) 24699993 (eISSN)

Vol. 89 6 064315


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