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α decay of high-spin isomers in
N=84
isotones
- Author(s): Clark, RM
- Crawford, HL
- Macchiavelli, AO
- Rudolph, D
- Såmark-Roth, A
- Campbell, CM
- Cromaz, M
- Fallon, P
- Morse, C
- Santamaria, C
- et al.
Published Web Location
https://journals.aps.org/prc/pdf/10.1103/PhysRevC.99.024325No data is associated with this publication.
Abstract
© 2019 American Physical Society. The superfluid tunneling model is applied to the calculation of half-lives of the observed α decays in N=84 isotones. Results of our calculations are compared to experimental data on the ground-state α decays along the isotonic chain from Nd144 to Re159. Good agreement is found. The α decays of the known high-spin isomers in Lu155, Hf156, Ta157, and W158 are also well reproduced, once a reduction in the pairing strength is taken into account. This includes reproduction of the main features of the recently observed fine structure from Lu155(25/2-) and Hf156(8+). Predictions for the α-decay fine structure of Ta157(25/2-) and W158(8+) high-spin isomers are presented.