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., Badran, H., Cox, D., Cubiss, J. G., O’Donnell, D., Grahn, T., Greenlees, P., Herzan, A., Higgins, E., Julin, R., Juutinen, S., Klimo, J., Konki, J., Leino, M., . . . Weaving, F. (2019). Identification of a 6.6μs isomeric state in 175Ir. Physical Review C, 99(6), Article 064310. https://doi.org/10.1103/PhysRevC.99.064310
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Physical Review CDate
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© 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.
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