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Beta decay of the exotic Tz = - 2, $^{56}$Zn nucleus and half-life of various proton-rich Tz = -1 nuclei

Abstract : Preliminary results of an experimental study of the beta -decay of the exotic T$_z$ = - 2, $^{56}$Zn nucleus and other proton-rich T$_z$ = -1 nuclei are presented. The ions were produced at GANIL using fragmentation reactions, separated by the LISE3 spectrometer and implanted in a double-sided silicon strip detector surrounded by Ge detectors. The half-lives of $^{56}$Zn and four T$_z$ = -1 nuclei in the fp-shell have been measured. While the decay of the T$_z$ = -1 nuclei proceeds essentially by -delayed gamma emission, in the case of $^{56}$Zn -delayed proton emission is also observed. Moreover, the exotic -delayed gamma-proton decay is seen for the first time. The information from the decay study has been used to determine the absolute Fermi and Gamow-Teller transition strengths. The results for $^{56}$Zn have been compared with the mirror Charge Exchange process, the ($^3$He,t) reaction on the T$_z$ = +2, $^{56}$Fe target nucleus. This comparison is important for understanding the $^{56}$Zn decay data.
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http://hal.in2p3.fr/in2p3-00954498
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Submitted on : Monday, March 3, 2014 - 10:13:19 AM
Last modification on : Saturday, June 13, 2020 - 6:30:02 PM

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S.E.A. Orrigo, B. Rubio, J. Agramunt, A. Algora, F. Molina, et al.. Beta decay of the exotic Tz = - 2, $^{56}$Zn nucleus and half-life of various proton-rich Tz = -1 nuclei. Acta Physica Polonica B, Jagellonian University, Cracow, 2014, 45, pp.355-362. ⟨10.5506/APhysPolB.45.355⟩. ⟨in2p3-00954498⟩

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