%0 Journal Article
%T Superallowed Gamow-Teller decay of the doubly magic nucleus Sn-100
%A Hinke, C. B. et al
%A Domingo-Pardo, C.
%J Nature
%D 2012
%V 486
%N 7403
%I Nature Publishing Group
%@ 0028-0836
%G English
%F Hinke+Domingo-Pardo2012
%O WOS:000305466800032
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1055), last updated on Thu, 05 Jul 2012 14:01:11 +0000
%X The shell structure of atomic nuclei is associated with 'magic numbers' and originates in the nearly independent motion of neutrons and protons in a mean potential generated by all nucleons. During beta(+)-decay, a proton transforms into a neutron in a previously not fully occupied orbital, emitting a positron-neutrino pair with either parallel or antiparallel spins, in a Gamow-Teller or Fermi transition, respectively. The transition probability, or strength, of a Gamow-Teller transition depends sensitively on the underlying shell structure and is usually distributed among many states in the neighbouring nucleus. Here we report measurements of the half-life and decay energy for the decay of Sn-100, the heaviest doubly magic nucleus with equal numbers of protons and neutrons. In the beta-decay of Sn-100, a large fraction of the strength is observable because of the large decay energy. We determine the largest Gamow-Teller strength so far measured in allowed nuclear beta-decay, establishing the 'superallowed' nature of this Gamow-Teller transition. The large strength and the low-energy states in the daughter nucleus, In-100, are well reproduced by modern, large-scale shell model calculations.
%R 10.1038/nature11116
%U https://doi.org/10.1038/nature11116
%P 341-345