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.
Författare
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 064315Ämneskategorier
Subatomär fysik
Fysik
Fundament
Grundläggande vetenskaper
DOI
10.1103/PhysRevC.89.064315