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Evidence for a Change in the Nuclear Mass Surface with the Discovery of the Most Neutron-Rich Nuclei with 17Z25

O. B. Tarasov, D. J. Morrissey, A. M. Amthor, T. Baumann, D. Bazin, A. Gade, T. N. Ginter, M. Hausmann, N. Inabe, T. Kubo, A. Nettleton, J. Pereira, M. Portillo, B. M. Sherrill, A. Stolz, and M. Thoennessen
Phys. Rev. Lett. 102, 142501 – Published 6 April 2009

Abstract

The results of measurements of the production of neutron-rich nuclei by the fragmentation of a Ge76 beam are presented. The cross sections were measured for a large range of nuclei including 15 new isotopes that are the most neutron-rich nuclides of the elements chlorine to manganese (Cl50, Ar53, K55,56, Ca57,58, Sc59,60,61, Ti62,63, V65,66, Cr68, Mn70). The enhanced cross sections of several new nuclei relative to a simple thermal evaporation framework, previously shown to describe similar production cross sections, indicates that nuclei in the region around Ti62 might be more stable than predicted by current mass models and could be an indication of a new island of inversion similar to that centered on Na31.

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  • Received 15 January 2009

DOI:https://doi.org/10.1103/PhysRevLett.102.142501

©2009 American Physical Society

Authors & Affiliations

O. B. Tarasov1,2, D. J. Morrissey1,3, A. M. Amthor1,4, T. Baumann1, D. Bazin1, A. Gade1,4, T. N. Ginter1, M. Hausmann1, N. Inabe5, T. Kubo5, A. Nettleton1,4, J. Pereira1, M. Portillo1, B. M. Sherrill1,4, A. Stolz1, and M. Thoennessen1,4

  • 1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 2Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Moscow Region, Russian Federation
  • 3Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
  • 4Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 5RIKEN Nishina Center, RIKEN, Wako-shi, Saitama 351-0198, Japan

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Issue

Vol. 102, Iss. 14 — 10 April 2009

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