Multi-particle emission in the decay of $^{31}$Ar - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2014

Multi-particle emission in the decay of $^{31}$Ar

G. T. Koldste
  • Function : Author
Bertram Blank
M. J. G. Borge
  • Function : Author
J. A. Briz
  • Function : Author
M. Carmona-Gallardo
  • Function : Author
L. M. Fraile
  • Function : Author
H. O. U. Fynbo
  • Function : Author
J. Giovinazzo
B. D. Grann
  • Function : Author
J. G. Johansen
  • Function : Author
A. Jokinen
  • Function : Author
B. Jonson
  • Function : Author
J. H. Kusk
  • Function : Author
T. Nilsson
A. Perea
  • Function : Author
V. Pesudo
  • Function : Author
E. Picado
  • Function : Author
K. Riisager
  • Function : Author
A. Saastamoinen
  • Function : Author
O. Tengblad
  • Function : Author
J. van de Walle
  • Function : Author

Abstract

A multi-hit capacity setup was used to study the decay of the dripline nucleus 31Ar, produced at the ISOLDE facility at CERN. A spectroscopic analysis of the beta-delayed three-proton decay of 31Ar is presented for the first time together with a quantitative analysis of the beta-delayed two-proton-gamma-decay. A new method for determination of the spin of low-lying levels in the beta-proton-daughter 30S using proton-proton angular correlations is presented and used for the level at 5.2 MeV, which is found to be either a 3+ or 4+ level, with the data pointing towards the 3+. The half-life of 31Ar is found to be 15.1(3) ms. An improved analysis of the Fermi beta-strength gives a total measured branching for the beta-3p-decay of 3.60(44) %, which is lower than the theoretical value found to be 4.24(43) %. Finally the strongest gamma-transitions in the decay of 33Ar are shown including a line at 4734(3) keV associated to the decay of the IAS, which has not previously been identified.

Dates and versions

in2p3-00950155 , version 1 (21-02-2014)

Identifiers

Cite

G. T. Koldste, Bertram Blank, M. J. G. Borge, J. A. Briz, M. Carmona-Gallardo, et al.. Multi-particle emission in the decay of $^{31}$Ar. Physical Review C, 2014, 89, pp.064315. ⟨10.1103/PhysRevC.89.064315⟩. ⟨in2p3-00950155⟩
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