Edinburgh Research Explorer

Superallowed Gamow–Teller decay of the doubly magic nucleus 100Sn

Research output: Contribution to journalArticle

  • C. B. Hinke
  • M. Böhmer
  • P. Boutachkov
  • T. Faestermann
  • H. Geissel
  • J. Gerl
  • R. Gernhäuser
  • M. Górska
  • A. Gottardo
  • H. Grawe
  • J. L. Grębosz
  • R. Krücken
  • N. Kurz
  • L. Maier
  • F. Nowacki
  • S. Pietri
  • Zs. Podolyák
  • K. Sieja
  • K. Steiger
  • K. Straub
  • H. Weick
  • H.-j. Wollersheim
  • N. Al-dahan
  • N. Alkhomashi
  • A. Ataç
  • A. Blazhev
  • N. F. Braun
  • I. T. Čeliković
  • I. Dillmann
  • C. Domingo-pardo
  • P. C. Doornenbal
  • G. De France
  • G. F. Farrelly
  • F. Farinon
  • N. Goel
  • T. C. Habermann
  • R. Hoischen
  • R. Janik
  • M. Karny
  • A. Kaşkaş
  • I. M. Kojouharov
  • Th. Kröll
  • Y. Litvinov
  • S. Myalski
  • F. Nebel
  • S. Nishimura
  • C. Nociforo
  • J. Nyberg
  • A. R. Parikh
  • A. Procházka
  • P. H. Regan
  • C. Rigollet
  • H. Schaffner
  • C. Scheidenberger
  • S. Schwertel
  • P.-a. Söderström
  • S. J. Steer
  • A. Stolz
  • P. Strmeň

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)341-345
JournalNature
Volume486
Issue number7403
DOIs
StatePublished - 21 Jun 2012

Abstract

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 β+-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 100Sn, the heaviest doubly magic nucleus with equal numbers of protons and neutrons. In the β-decay of 100Sn, 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 β-decay, establishing the ‘superallowed’ nature of this Gamow–Teller transition. The large strength and the low-energy states in the daughter nucleus, 100In, are well reproduced by modern, large-scale shell model calculations.

ID: 4178547