Observation of a crossover of S-2n in the island of inversion from precision mass spectrometry

Abstract : Mass measurements have been performed of the neutron-rich Al isotopes near N approximate to 20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-neutron separation energy of Al-34(13) to be 24.8(10.8) keV less than that of Mg-33(12). This represents the first known crossover on the S-2n surface of the chart of nuclides. Large-scale shell-model calculations show that the crossover can be attributed to exceptionally large energy gains of the Mg isotopes in the island of inversion.
Type de document :
Article dans une revue
Physical Review C, American Physical Society, 2015, 92 (6), pp.061301. 〈10.1103/PhysRevC.92.061301〉
Liste complète des métadonnées

http://hal.in2p3.fr/in2p3-01251125
Contributeur : Emilie Bonnardel <>
Soumis le : mardi 5 janvier 2016 - 16:28:15
Dernière modification le : jeudi 30 novembre 2017 - 01:17:51

Identifiants

Collections

Citation

A. A. Kwiatkowski, C. Andreoiu, J. C. Bale, A. Chaudhuri, U. Chowdhury, et al.. Observation of a crossover of S-2n in the island of inversion from precision mass spectrometry . Physical Review C, American Physical Society, 2015, 92 (6), pp.061301. 〈10.1103/PhysRevC.92.061301〉. 〈in2p3-01251125〉

Partager

Métriques

Consultations de la notice

52