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Well Developed Deformation in Si42

Journal Article · · Physical Review Letters
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  1. RIKEN Nishina Center, Wako (Japan)
  2. RIKEN Nishina Center, Wako (Japan); Rikkyo University, Toshima (Japan). Department of Physics
  3. RIKEN Nishina Center, Wako (Japan); Peking University, Beijing (China)
  4. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
  5. Grand Accelerateur National d Ions Lourds, CEA/DSM-CNRS/IN2P3 (France)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Technische Universitat Munchen (Germany). Physik Dept.
  8. LPC-ENSICAEN, IN2P3-CNRS et Universite de Caen (France)
  9. University of Tokyo, RIKEN campus (Japan). Center for Nuclear Study
  10. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  11. University of Richmond, VA (United States). Department of Physics
  12. University of York, Heslington (United Kingdom). Physics Dept.
  13. Tokyo Institute of Technology (Japan). Department of Physics
  14. Institut fur Kernphysik, Johann-Wolfgang-Goethe-Universitat (Germany); GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  15. Institut de Physique Nucleaire, IN2P3-CNRS, Universite de Paris Sud (France)
+ Show Author Affiliations
For this research, excited states in 38,40,42Si nuclei have been studied via in-beam γ-ray spectroscopy with multinucleon removal reactions. Intense radioactive beams of 40S and 44S provided at the new facility of the RIKEN Radioactive Isotope Beam Factory enabled γ-γ coincidence measurements. A prominent γ line observed with an energy of 742(8) keV in 42Si confirms the 2+ state reported in an earlier study. Among the γ lines observed in coincidence with the 2+ → 0+ transition, the most probable candidate for the transition from the yrast 4+ state was identified, leading to a 41+ energy of 2173(14) keV. The energy ratio of 2.93(5) between the 21+ and 41+ states indicates well-developed deformation in 42Si at N = 28 and Z = 1 . Also for 38,40Si energy ratios with values of 2.09(5) and 2.56(5) were obtained. Finally, together with the ratio for 42Si, the results show a rapid deformation development of Si isotopes from N = 24 to N = 28.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1407164
Alternate ID(s):
OSTI ID: 1101719
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 109; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Merging of the islands of inversion at N = 20 and N = 28 journal July 2014
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A study of shell structure in normal to exotic nuclides within relativistic Hartree–Bogoliubov approximation journal January 2019
Properties of exotic nuclei and their linkage to the nucleonic interaction journal January 2020
Properties of exotic nuclei and their linkage to the nucleonic interaction text January 2019

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