First observation of $\beta$-delayed $\gamma$-proton decay in the $T_z$ = -2, $^{56}$Zn nucleus - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2014

First observation of $\beta$-delayed $\gamma$-proton decay in the $T_z$ = -2, $^{56}$Zn nucleus

S. E. A. Orrigo
  • Function : Author
B. Rubio
  • Function : Author
Y. Fujita
  • Function : Author
Bertram Blank
W. Gelletly
  • Function : Author
J. Agramunt
  • Function : Author
A. Algora
  • Function : Author
P. Ascher
B. Bilgier
  • Function : Author
R. B. Cakirli
  • Function : Author
H. Fujita
  • Function : Author
E. Ganioğlu
  • Function : Author
M. Gerbaux
J. Giovinazzo
S. Grévy
  • Function : Author
H. C. Kozer
  • Function : Author
L. Kucuk
  • Function : Author
T. Kurtukian Nieto
F. Molina
  • Function : Author
L. Popescu
  • Function : Author
A. M. Rogers
  • Function : Author
G. Susoy
  • Function : Author
C. Stodel
T. Suzuki
  • Function : Author
A. Tamii
  • Function : Author

Abstract

We report on the first experimental observation of a very exotic decay mode at the proton drip-line, the $\beta$-delayed $\gamma$-proton decay, clearly seen in the $\beta$ decay of the $T_z$ = -2, $^{56}$Zn nucleus. The $^{56}$Zn half-life and decay scheme have been determined. The decay proceeds by $\beta$-delayed proton emission and $\beta$-delayed $\gamma$ de-excitation. The exotic $\beta$-delayed $\gamma$-proton emission was also detected in three cases. It affects the usual determination of the Gamow-Teller (GT) strength. Absolute Fermi and GT strengths have been deduced. Evidence for fragmentation of the Fermi strength due to isospin mixing is found.

Dates and versions

in2p3-00939876 , version 1 (31-01-2014)

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Cite

S. E. A. Orrigo, B. Rubio, Y. Fujita, Bertram Blank, W. Gelletly, et al.. First observation of $\beta$-delayed $\gamma$-proton decay in the $T_z$ = -2, $^{56}$Zn nucleus. Physical Review Letters, 2014, 112, pp.939876. ⟨10.1103/PhysRevLett.112.222501⟩. ⟨in2p3-00939876⟩
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