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Nuclear structure of 37, 38Si investigated by decay spectroscopy of 37, 38Al

  • K. Steiger
  • S. Nishimura
  • Z. Li
  • R. GernhäuserEmail author
  • Y. Utsuno
  • R. Chen
  • T. Faestermann
  • C. Hinke
  • R. Krücken
  • M. Kurata-Nishimura
  • G. Lorusso
  • Y. Miyashita
  • N. Shimizu
  • K. Sugimoto
  • T. Sumikama
  • H. Watanabe
  • K. Yoshinaga
Regular Article - Experimental Physics

Abstract

We present a study on the β decays of the neutron-rich isotopes 37Al and 38Al, produced by projectile fragmentation of a 48Ca beam with an energy E = 345 A MeV at the RIKEN Nishina Center. The half-lives of 37Al and 38Al have been measured to 11.5(4)ms and 9.0(7)ms, respectively, using the CAITEN implantation and decay detector setup. The level schemes for 37Si and 38Si were deduced by employing γ-γ coincidence spectroscopy following the event-by-event identification of the implanted nuclei. Comparison to large scale nuclear shell model calculations allowed for a tentative assignment of spin and parity of the populated states. The data indicate that the classical shell gap at magic neutron number N = 28 between the νf 7/2 and νp 3/2 orbits gets reduced by 0.3 MeV in this region leading to low-energy states with intruder configuration in 37Si.

Keywords

Shell Model Calculation Tensor Force Silicon Isotope Projectile Fragmentation Magic Neutron Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • K. Steiger
    • 1
  • S. Nishimura
    • 2
  • Z. Li
    • 2
    • 3
  • R. Gernhäuser
    • 1
    Email author
  • Y. Utsuno
    • 4
    • 5
  • R. Chen
    • 2
  • T. Faestermann
    • 1
  • C. Hinke
    • 1
  • R. Krücken
    • 1
    • 6
    • 7
  • M. Kurata-Nishimura
    • 2
  • G. Lorusso
    • 2
  • Y. Miyashita
    • 8
  • N. Shimizu
    • 5
  • K. Sugimoto
    • 8
  • T. Sumikama
    • 9
  • H. Watanabe
    • 2
    • 10
    • 11
  • K. Yoshinaga
    • 8
  1. 1.Physik Department E12Technische Universität MünchenGarchingGermany
  2. 2.RIKEN Nishina CenterSaitamaJapan
  3. 3.Department of PhysicsPeking UniversityBeijingChina
  4. 4.Advanced Science Research CenterJapan Atomic Energy AgencyTokai, IbarakiJapan
  5. 5.Center for Nuclear StudyUniversity of TokyoTokyoJapan
  6. 6.TRIUMFVancouverCanada
  7. 7.Department of Physics and AstronomyUniversity of British ColumbiaVancouverCanada
  8. 8.Department of PhysicsTokyo University of ScienceChibaJapan
  9. 9.Department of PhysicsTohoku UniversityMiyagiJapan
  10. 10.International Research Center for Nuclei and Particles in the CosmosBeihang UniversityBeijingChina
  11. 11.School of Physics and Nuclear Energy EngineeringBeihang UniversityBeijingChina

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