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Berry, T. A.*; Podolyk, Zs.*; Carroll, R. J.*; Lic
, R.*; Grawe, H.*; Timofeyuk, N. K.*; Alexander, T.*; Andreyev, A. N.; Ansari, S.*; Borge, M. J. G.*; et al.
Physics Letters B, 793, p.271 - 275, 2019/06
被引用回数:5 パーセンタイル:46.65(Astronomy & Astrophysics)Gamow-Teller decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This
= 0 requirement plays a major role in the
decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical
-process pathway below both
= 50 (for
82) and
= 82 (for
126). The level of forbiddenness of the
= 1
1
0
transition has been investigated from the
decay of the ground state of
Hg into the single-proton-hole nucleus
Tl in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible
-ray transitions depopulating the
0
state in
Tl, an upper limit of 3.9
10
% was obtained for the probability of this decay, corresponding to log
8.8 within a 95% confidence limit. This is the most stringent test of the
= 0 selection rule to date.