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Precision mass measurements of magnesium isotopes and implications for the validity of the isobaric mass multiplet equation

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [1];  [5];  [6];  [7];  [8];  [9];  [8];  [8];  [10];  [11];  [12];  [13];  [14];  [8];  [8];  [8] more »;  [11];  [15];  [15];  [16] « less
  1. Univ. of Notre Dame, Notre Dame, IN (United States)
  2. TRIUMF, Vancouver, BC (Canada); Texas A & M Univ., College Station, TX (United States)
  3. TRIUMF, Vancouver, BC (Canada); Univ. Heidelberg, Philosophenweg (Germany)
  4. Simon Fraser Univ., Burnaby, BC (Canada)
  5. TRIUMF, Vancouver, BC (Canada); Canadian Nuclear Labs., Chalk River, ON (Canada)
  6. TRIUMF, Vancouver, BC (Canada); SNOLAB, Lively, ON (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
  7. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. TRIUMF, Vancouver, BC (Canada)
  9. Univ. of Manitoba, Winnipeg, MB (Canada)
  10. TRIUMF, Vancouver, BC (Canada); Max-Planck-Institut fur Kernphysik, Heidelberg (Germany)
  11. TRIUMF, Vancouver, BC (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
  12. TRIUMF, Vancouver, BC (Canada); Simon Fraser Univ., Burnaby, BC (Canada); Colorado School of Mines, Golden, CO (United States)
  13. TRIUMF, Vancouver, BC (Canada); Westfalische Wilhelms-Univ., Munster (Germany)
  14. Univ. of Notre Dame, Notre Dame, IN (United States); Wellesley College, Wellesley, MA (United States)
  15. Univ. of Calgary, Alberta (Canada)
  16. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
+ Show Author Affiliations
If the mass excess of neutron-deficient nuclei and their neutron-rich mirror partners are both known, it can be shown that deviations of the isobaric mass multiplet equation (IMME) in the form of a cubic term can be probed. Such a cubic term was probed by using the atomic mass of neutron-rich magnesium isotopes measured using the TITAN Penning trap and the recently measured proton-separation energies of 29Cl and 30Ar. The atomic mass of 27Mg was found to be within 1.6σ of the value stated in the Atomic Mass Evaluation. The atomic masses of 28,29Mg were measured to be both within 1σ, while being 7 and 33 times more precise, respectively. Using the 29Mg mass excess and previous measurements of 29Cl, we uncovered a cubic coefficient of d = 28(7)keV, which is the largest known cubic coefficient of the IMME. This departure, however, could also be caused by experimental data with unknown systematic errors. Hence there is a need to confirm the mass excess of 28S and the one-neutron separation energy of 29Cl, which have both come from a single measurement. Lastly, our results were compared with ab initio calculations from the valence-space in-medium similarity renormalization group, resulting in a good agreement.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1399722
Alternate ID(s):
OSTI ID: 1392163
Report Number(s):
LLNL-JRNL--734384
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 96; ISSN PRVCAN; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

New mass measurements with trapped (radioactive) ions and related fundamental physics journal May 2019
Isobaric multiplet mass equation within nuclear density functional theory journal January 2019

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