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Title: Testing microscopically derived descriptions of nuclear collectivity: Coulomb excitation of 22Mg

Many-body nuclear theory utilizing microscopic or chiral potentials has developed to the point that collectivity might be studied within a microscopic or ab initio framework without the use of effective charges; for example with the proper evolution of the E2 operator, or alternatively, through the use of an appropriate and manageable subset of particle–hole excitations. We present a precise determination of E2 strength in 22Mg and its mirror 22Ne by Coulomb excitation, allowing for rigorous comparisons with theory. No-core symplectic shell-model calculations were performed and agree with the new B ( E 2 ) values while in-medium similarity-renormalization-group calculations consistently underpredict the absolute strength, with the missing strength found to have both isoscalar and isovector components. The discrepancy between two microscopic models demonstrates the sensitivity of E2 strength to the choice of many-body approximation employed.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [2] ;  [5] ;  [6] ;  [7] ;  [2] ;  [2] ;  [8] ;  [2] ;  [2] ;  [9] ;  [9] ;  [9] ;  [2] ;  [8] ;  [9] more »;  [10] ;  [2] ;  [2] ;  [6] ;  [2] ;  [9] ;  [7] ;  [11] « less
  1. TRIUMF, Vancouver, BC (Canada); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. TRIUMF, Vancouver, BC (Canada)
  3. Univ. of Jyväskylä (Finland). Dept. of Physics
  4. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  5. Univ. of Sulaimani (Iraq). Dept. of Physics; Univ. of Guelph, ON (Canada). Dept. of Physics
  6. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy
  7. Univ. of York (United Kingdom). Dept. of Physics
  8. TRIUMF, Vancouver, BC (Canada); Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
  9. Univ. of Guelph, ON (Canada). Dept. of Physics
  10. TRIUMF, Vancouver, BC (Canada); Univ. of Guelph, ON (Canada). Dept. of Physics
  11. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-736727
Journal ID: ISSN 0370-2693; 889556
Grant/Contract Number:
AC52-07NA27344; OIA-1738287; ACI-1713690; ST/L005735/1
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 782; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Louisiana State Univ., Baton Rouge, LA (United States); TRIUMF, Vancouver, BC (Canada); Univ. of Guelph, ON (Canada); Univ. of York (United Kingdom)
Sponsoring Org:
USDOE; National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); The Canada Foundation for Innovation; British Columbia Knowledge Development Fund (Canada); National Research Council (NRC) (Canada); Science and Technology Facilities Council (STFC) (United Kingdom)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 22Mg; 22Ne; ab initio; collectivity; Coulomb excitation
OSTI Identifier:
1439727
Alternate Identifier(s):
OSTI ID: 1458694