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Title: Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations

Journal Article · · Physical Review C
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [6];  [7];  [8];  [2];  [9];  [10];  [11];  [12];  [6];  [13];  [14];  [15];  [10];  [9] more »;  [16];  [17];  [9];  [3];  [10];  [18];  [2];  [19];  [20];  [2];  [21];  [22];  [23];  [23];  [13];  [19] « less
  1. Justus-Liebig-Univ., GieBen (Germany); TRIUMF, Vancouver, BC (Canada); Univ. of Edinburgh (United Kingdom)
  2. Justus-Liebig-Univ., GieBen (Germany); GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  3. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Technische Univ. Darmstadt (Germany)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); JINA-CEE, East Lansing, MI (United States)
  5. Simon Fraser Univ., Burnaby, BC (Canada)
  6. TRIUMF, Vancouver, BC (Canada)
  7. TRIUMF, Vancouver, BC (Canada); Ruprecht-Karls-Univ., Heidelberg (Germany)
  8. TRIUMF, Vancouver, BC (Canada); McGill Univ., Montreal, QC (Canada)
  9. TRIUMF, Vancouver, BC (Canada); Univ. of British Columbia, Vancouver, BC (Canada)
  10. TRIUMF, Vancouver, BC (Canada); Univ. of Victoria, BC (Canada)
  11. TRIUMF, Vancouver, BC (Canada); Univ. of York (United Kingdom)
  12. Univ. of Manitoba, Winnipeg, MB (Canada)
  13. Justus-Liebig-Univ., GieBen (Germany)
  14. TRIUMF, Vancouver, BC (Canada); Max-Planck-Institut für Kernphysik Heidelberg (Germany)
  15. TRIUMF, Vancouver, BC (Canada); Univ. of Manitoba, Winnipeg, MB (Canada)
  16. TRIUMF, Vancouver, BC (Canada); Northwestern Univ., Evanston, IL (United States)
  17. Colorado School of Mines, Golden, CO (United States)
  18. TRIUMF, Vancouver, BC (Canada); Ruprecht-Karls-Univ. Heidelberg (Germany)
  19. Michigan State Univ., East Lansing, MI (United States)
  20. JINA-CEE, East Lansing, MI (United States)
  21. GSI-Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Technische Univ. Darmstadt (Germany); Univ. of Minnesota, Minneapolis, MN (United States)
  22. TRIUMF, Vancouver, BC (Canada); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  23. Univ. of Calgary, AB (Canada)
+ Show Author Affiliations

We report mass measurements of neutron-rich Ga isotopes 80–85Ga with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of 80–83Ga in good agreement with previous measurements. Here, the masses of 84Ga and 85Ga were measured for the first time. Uncertainties between 25 and 48 keV were reached. The new mass values reduce the nuclear uncertainties associated with the production of A ≈ 84 isotopes by the r-process for astrophysical conditions that might be consistent with a binary neutron star (BNS) merger producing a blue kilonova. Our nucleosynthesis simulations confirm that BNS merger may contribute to the first abundance peak under moderate neutron-rich conditions with electron fractions Ye = 0.35–0.38.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); Canadian-UK Foundation; German Inst. DFG; German Federal Ministry of Education and Research (BMBF); Helmholtz Association through NAVI
Grant/Contract Number:
AC52-06NA25396; 89233218CNA000001; PHY-1419765; PHY-1614130; SC0017649; ST/L005816/1; ST/L005743/1; FR 601/3-1; SFB 1245; 05P15RGFN1; 05P12RGFN8; VH-VI-417
OSTI ID:
1603982
Report Number(s):
LA-UR-18-28439; PRVCAN; TRN: US2104169
Journal Information:
Physical Review C, Vol. 101, Issue 2; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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