First observation of $\beta$-delayed $\gamma$-proton decay in the $T_z$ = -2, $^{56}$Zn nucleus
Language
en
Article de revue
This item was published in
Physical Review Letters. 2014, vol. 112, p. 939876
American Physical Society
English 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 ...Read more >
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.Read less <
Origin
Hal imported