Identification of new nuclei near the proton-drip line for 31≤Z≤38

Abstract

An E/A=65 MeV ${}_{}{}^{78}{}_{}{}^{}\mathrm{Kr}$ beam has been used to produce six new isotopes near the proton-drip line. The newly commissioned A1200 beam-analysis device was used to observe the astrophysically interesting isotope ${}_{}{}^{65}{}_{}{}^{}\mathrm{As}$, as well as ${}_{}{}^{61}{}_{}{}^{}\mathrm{Ga}$, ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ge}$, ${}_{}{}^{63}{}_{}{}^{}\mathrm{Ge}$, ${}_{}{}^{69}{}_{}{}^{}\mathrm{Br}$, and ${}_{}{}^{75}{}_{}{}^{}\mathrm{Sr}$. Implications of the observation of these nuclei are discussed in terms of the astrophysical rp process.