Identification of a 6.6μs isomeric state in 175Ir
Gillespie, S. A., Andreyev, A. N., Monthery, M. A., Barton, C. J., Antalic, S., Auranen, K., . . . Weaving, F. (2019). Identification of a 6.6μs isomeric state in 175Ir. Physical Review C, 99 (6), 064310. doi:10.1103/PhysRevC.99.064310
Published inPhysical Review C
© 2019 American Physical Society
An experiment has been performed to study excited states in the neutron-deficient nucleus 175Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyväskylä. By using isomer tagging, an isomeric state with a half-life of 6.58(15) μs has been observed in 175Ir for the first time. It has been established that the isomer decays via a 45.2 (E1)–26.1 (M1) keV cascade to new states below the previously reported ground state in 175Ir with Iπ = (5/2−). We now reassign this (5/2−) state to the isomeric state discovered in this study.