Cubiss, JG, Barzakh, AE, Andreyev, AN, Al Monthery, M, Althubiti, N, Andel, B, Antalic, S, Atanasov, D, Blaum, K, Cocolios, TE et al (show 50 more authors)
(2018)
Change in structure between the I = 1/2 states in 181Tl and 177,179Au.
Physics Letters B, 786.
pp. 355-363.
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Abstract
The first accurate measurements of the α-decay branching ratio and half-life of the Iπ=1/2+ ground state in 181Tl have been made, along with the first determination of the magnetic moments and I=1/2 spin assignments of the ground states in 177,179Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, Iπ=1/2+ states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2+→1/2+, 181Tl→g177Aug α decay, which is explained by a mixing of π3s1/2 and π2d3/2 configurations in 177Aug, whilst 181Tlg remains a near-pure π3s1/2. This conclusion is inferred from the g factor of 177Aug which has an intermediate value between those of π3s1/2 and π2d3/2 states. A similar mixed configuration is proposed for the Iπ=1/2+ ground state of 179Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Nuclear physics, Decay spectroscopy, Laser spectroscopy, Nuclear deformation |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 01 Nov 2018 14:51 |
| Last Modified: | 19 Jan 2023 01:13 |
| DOI: | 10.1016/j.physletb.2018.10.005 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3028266 |
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