Fe49: A NewTZ=−32Delayed-Proton Emitter

Abstract

Iron-49 with a half-life of 75±10 msec was produced by the reaction ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}({}_{}{}^{12}{}_{}{}^{}\mathrm{C}, 3n){}_{}{}^{49}{}_{}{}^{}\mathrm{Fe}$ using 65-MeV carbon ions; beta-delayed protons with an energy of 1.96±0.05 MeV probably originating from the lowest $T=\frac{3}{2}$ state in ${}_{}{}^{49}{}_{}{}^{}\mathrm{Mn}$ were observed.