Production cross-sections of proton-rich 70Ge fragments and the decay of 57Zn and 61Ge
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Proton-rich isotopes of zinc and germanium, 57Zn and 61Ge, have been produced by fragmentation of a 70Ge beam at the LISE3 facility of GANIL. Their main decay characteristics have been studied after implantation in a double-sided silicon strip detector. In addition, the production cross-sections of proton-rich isotopes in the copper-to-germanium region have been determined. These cross-sections are much lower than predicted by the EPAX formula. These findings question to some extent the production rates expected for present and future fragmentation facilities.
PACS.21.10.-k Properties of nuclei; nuclear energy levels 21.10.Tg Lifetimes 23.50.+z Decay by proton emission 29.30.Ep Charged-particle spectroscopy
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