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Title: Shape coexistence and the role of axial asymmetry in 72Ge

The quadrupole collectivity of low-lying states and the anomalous behavior of the0 + 2 and 2 + 3 levels in 72Ge are investigated via projectile multi-step Coulomb excitation with GRETINA and CHICO-2. A total of forty six E2 and M1 matrix elements connecting fourteen low-lying levels were determined using the least-squares search code, GOSIA. Evidence for triaxiality and shape coexistence, based on the model-independent shape invariants deduced from the Kumar–Cline sum rule, is presented. Moreover, these are interpreted using a simple two-state mixing model as well as multi-state mixing calculations carried out within the framework of the triaxial rotor model. Our results represent a significant milestone towards the understanding of the unusual structure of this nucleus.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [5] ;  [6] ;  [7] ;  [1] ;  [1] ;  [6] ;  [1] ;  [1] ;  [8] ;  [9] more »;  [1] ;  [10] ;  [7] ;  [1] ;  [10] « less
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Georgia Inst. of Technology, Atlanta, GA (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States)
  6. Univ. of Rochester, NY (United States)
  7. Ohio Univ., Athens, OH (United States)
  8. Univ. of Tennessee, Knoxville, TN (United States)
  9. CNRS/IN2P3. Univ. Paris (France)
  10. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-681128
Journal ID: ISSN 0370-2693
Grant/Contract Number:
AC52-07NA27344; AC02-06CH11357; FG02-94ER40834; FG02-08ER41556; AC05-00OR22725; AC02-05CH11231
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 754; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1236081
Alternate Identifier(s):
OSTI ID: 1237576; OSTI ID: 1266008; OSTI ID: 1339092; OSTI ID: 1379147