Beta decay of exotic TZ = -1, -2 nuclei: the interesting case of 56Zn

• Main Authors: Orrigo S.E.A., Rubio B., Fujita Y., Blank B., Gelletly W., Agramunt J., Algora A., Ascher P., Bilgier B., Cáceres L., Cakirli R. B., Fujita H., Ganioğlu E., Gerbaux M., Giovinazzo J., Grévy S., Kamalou O., Kozer H. C., Kucuk L., Kurtukian-Nieto T., Molina F., Popescu L., Rogers A. M., Susoy G., Stodel C., Suzuki T., Tamii A., Thomas J. C.
• Format: Article
• Language: English
• Published: EDP Sciences 2014-03-01
• Series: EPJ Web of Conferences
• Online Access: http://dx.doi.org/10.1051/epjconf/20146602077

The β decay properties of the Tz = -2, 56Zn isotope and other proton-rich nuclei in the fp-shell have been investigated in an experiment performed at GANIL. The ions were produced in fragmentation reactions and implanted in a double-sided silicon strip detector surrounded by Ge EXOGAM clovers. Preliminary results for 56Zn are presented .The 56Zn decay proceeds mainly by β delayed proton emission, but β delayed gamma rays were also detected. Moreover, the exotic β delayed gamma-proton decay was observed for the first time. The 56Zn half-life and the energy levels populated in the 56Cu daughter have been determined. Knowledge of the gamma de-excitation of the mirror states in 56Co and the comparison with the results of the mirror charge exchange process, the 56Fe(3He,t) reaction (where 56Fe has Tz = +2), were important in the interpretation of the 56Zn decay data. The absolute Fermi and Gamow-Teller strengths have been deduced.