Orbital dependent nucleonic pairing in the lightest known isotopes of tin

Abstract

By studying the 109Xe-->105Te-->101Sn superallowed alpha-decay chain, we observe low-lying states in 101Sn, the one-neutron system outside doubly magic 100Sn. We find that the spins of the ground state (J = 7=2) and first excited state (J = 5=2) in 101Sn are reversed with respect to the traditional level ordering postulated for 103Sn and the heavier tin isotopes. Through simple arguments and state-of-the-art shell model calculations we explain this unexpected switch in terms of a transition from the single-particle regime to the collective mode in which orbital-dependent pairing correlations, dominate.

5 pages 3 figures

References in corpus (1)

• Recent developments in no-core shell-model calculations

Cited by in corpus (12)

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• Alpha Decay in the Complex Energy Shell Model
• Production of proton-rich nuclei in the vicinity of 100Sn via multinucleon transfer reactions
• The anomalous quadrupole collectivity in Te isotopes
• Electromagnetic Properties of Indium Isotopes Elucidate the Doubly Magic Character of ${}^{100}$Sn
• Isomeric excitation energy for ${}^{99}$In${}^m$ from mass spectrometry reveals constant trend next to doubly magic ${}^{100}$Sn
• Effective shell-model interaction for nuclei southeast of ${}^{100}$Sn
• Shell Model Description of ${}^{102-108}$Sn Isotopes
• Large-scale configuration interaction description of the structure of nuclei around ${}^{100}$Sn and ${}^{208}$Pb
• Partial conservation of seniority in semi-magic nuclei