$\beta$-Delayed Proton Emission of ${}^{71}$Kr
ORAL
Abstract
Mirror nuclei above $A\sim60$ play a key role in understanding the role of isospin in nuclear structure. The character of states in the $^{71}$Kr/$^{71}$Br mirror pair ($T=1/2$), that exhibit oblate-prolate shape coexistence, has been of significant interest for many years. Properties of this mirror system were investigated in an implant-decay experiment conducted at the NSCL using a beam containing $^{71}$Kr, produced by fragmentation of a $^{92}$Mo primary beam on a Be target and purified with the RF Fragment Separator, that was implanted into the Beta Counting Station surrounded by SeGA. $\beta$-decay branching to the lowest states of $^{71}$Br was observed as well as delayed-proton emission feeding the lowest states of $^{70}$Se. The results obtained from charged particle and $\gamma$-ray spectroscopy as well as implications for the structure of nuclei with $N \sim Z$ will be presented
*This material is based upon work supported by the U.S. DOE, Office of Science, Office of Nuclear Physics under Award No. DE-FG02-94ER40848, DE-FG02-88ER40387 and DE-AC02-06CH11357; the NNSA through the Nuclear Science and Security Consortium under Award No. DE-NA0003180, DE-NA0003221, DE-NA0002132 and DE-NA0000979; and the NSF under Contract No. PHY-1102511.
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