A search for new neutron-rich isotopes near the $N=60$ isotones ⁹²Ge and ⁹³As has been performed using a 345 MeV/nucleon ²³⁸U beam at the RIKEN Nishina Center RI Beam Factory. Fission fragments produced were analyzed and identified in flight using the large-acceptance two-stage separator BigRIPS. We have observed a total of 15 new neutron-rich isotopes: ⁸⁴Cu, 86,87Zn, 88,89Ga, 91,92Ge, 93,94,95As, 96,97Se, 99,100Br, and ¹⁰³Kr.
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Shimizu et al. (2024) studied this question.
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