Shape coexistence and the role of axial asymmetry in 72 Ge

Ayangeakaa, A. D.; Janssens, R. V. F.; Wu, C. Y.; Allmond, J. M.; Wood, J. L.; Zhu, S.; Albers, M.; Almaraz-Calderon, S.; Bucher, B.; Carpenter, M. P.; Chiara, C. J.; Cline, D.; Crawford, H. L.; David, H. M.; Harker, J.; Hayes, A. B.; Hoffman, C. R.; Kay, B. P.; Kolos, K.; Korichi, A.; Lauritsen, T.; Macchiavelli, A. O.; Richard, A.; Seweryniak, D.; Wiens, A.

doi:10.1016/j.physletb.2016.01.036

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

Journal Article · Tue Mar 01 00:00:00 EST 2016 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2016.01.036· OSTI ID:1236081

; Janssens, R. V. F.; Wu, C. Y.; Allmond, J. M.; Wood, J. L.; Zhu, S.; Albers, M.; Almaraz-Calderon, S.; Bucher, B.; Carpenter, M. P.; Chiara, C. J.; Cline, D.; Crawford, H. L.; David, H. M.; Harker, J.; Hayes, A. B.; Hoffman, C. R.; Kay, B. P.; Kolos, K.; Korichi, A. more »

The quadrupole collectivity of low-lying states and the anomalous behavior of the 02+ and 23+ levels in 72 Ge 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. 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. The results represent a significant milestone towards the understanding of the unusual structure of this nucleus.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357; AC52-07NA27344; FG02-94ER40834; FG02-08ER41556; AC05-00OR22725; AC02-05CH11231

OSTI ID:: 1236081

Alternate ID(s):: OSTI ID: 1237576; OSTI ID: 1266008; OSTI ID: 1339092; OSTI ID: 1379147

Report Number(s):: LLNL-JRNL-681128; S0370269316000538; PII: S0370269316000538

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 754 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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Cited by: 52 works

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