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論文

Identification of sub-$$mu$$s isomeric states in the odd-odd nucleus $$^{178}$$Au

Gillespie, S. A.*; Stott, A.*; Andreyev, A. N.; 他30名*

Physical Review C, 103(4), p.044307_1 - 044307_9, 2021/04

 被引用回数:0 パーセンタイル:0.03(Physics, Nuclear)

Proton-rich Au isotopes are an excellent laboratory to study shape coexistence and isomerism at low excitation energies. In this work, two new isomeric states were found in the odd-odd nuclide $$^{178}$$Au in an experiment at RITU in JYFL, Jyvaskyla. These two isomers significantly extend the current knowledge of this nucleus and pave the way to future in beam studies where they will be used to tag new gamma rays. Possible spin assignments for the new isomeric states are proposed. Finally, the new data will help clarify the poorly known $$alpha$$-decay scheme of two long-lived states in the $$^{182}$$Tl to $$^{178}$$Au decay chain.

論文

Identification of a 6.6$$mu$$s isomeric state in $$^{175}$$Ir

Gillespie, S. A.*; Andreyev, A. N.; Al Monthery, M.*; Barton, C. J.*; Antalic, S.*; Auranen, K.*; Badran, H.*; Cox, D.*; Cubiss, J. G.*; O'Donnell, D.*; et al.

Physical Review C, 99(6), p.064310_1 - 064310_6, 2019/06

 被引用回数:3 パーセンタイル:52.47(Physics, Nuclear)

An experiment has been performed to study excited states in the neutron-deficient nucleus $$^{175}$$Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyv$"a$skyl$"a$. By using isomer tagging, an isomeric state with a half-life of 6.58(15) $$mu$$s has been observed in $$^{175}$$Ir 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 $$^{175}$$Ir with $$I^{pi} = (5/2^{-})$$. We now reassign this $$(5/2^{-})$$ state to the isomeric state discovered in this study.

報告書

Complementary Laboratory Work to Examine Microbial Effects on Redox and Quantification of the Effects of Microbiological Perturbations on the Geological Disposal of HLW (TRU)

West, J. M.*; 青木 和弘*; Baker, S. J.*; Bateman, K.*; Coombs, P.*; Gillespie, M. R.*; Henney, P. J.*; Reeder, S.*; Milodowski, A. E.*; Yoshida, H.

JNC TJ7400 99-002, 117 Pages, 1997/01

JNC-TJ7400-99-002.pdf:7.79MB

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