Maqola

Evidence for a Change in the Nuclear Mass Surface with the Discovery of the Most Neutron-Rich Nuclei with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>17</mml:mn><mml:mo>≤</mml:mo><mml:mi>Z</mml:mi><mml:mo>≤</mml:mo><mml:mn>25</mml:mn></mml:math>

O. TarasovMichigan State UniversityD. J. MorrisseyDepartment of Chemistry, Michigan State University, East Lansing, Michigan 48824, USAA. M. AmthorDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAT. BaumannNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAD. BazinNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAA. GadeDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAT. N. GinterNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. HausmannNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAN. InabeRIKEN Nishina Center, RIKEN, Wako-shi, Saitama 351-0198, JapanT. KuboRIKEN Nishina Center, RIKEN, Wako-shi, Saitama 351-0198, JapanA. NettletonDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAJ. PereiraNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. PortilloNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAB. M. SherrillDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAA. StolzNational Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USAM. ThoennessenDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

2009lv

ABI

Annotatsiya

The results of measurements of the production of neutron-rich nuclei by the fragmentation of a $^{76}\mathrm{Ge}$ 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 ($^{50}\mathrm{Cl}$, $^{53}\mathrm{Ar}$, $^{55,56}\mathrm{K}$, $^{57,58}\mathrm{Ca}$, $^{59,60,61}\mathrm{Sc}$, $^{62,63}\mathrm{Ti}$, $^{65,66}\mathrm{V}$, $^{68}\mathrm{Cr}$, $^{70}\mathrm{Mn}$). 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 $^{62}\mathrm{Ti}$ 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 $^{31}\mathrm{Na}$.

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Identifikatorlar

DOI: 10.1103/physrevlett.102.142501

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