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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

Abstract

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.

Authors:
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)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); Canadian-UK Foundation; German Inst. DFG; German Federal Ministry of Education and Research (BMBF); Helmholtz Association through NAVI
OSTI Identifier:
1603982
Report Number(s):
LA-UR-18-28439
Journal ID: ISSN 2469-9985; PRVCAN
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
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 101; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Binding energy & masses; Nuclear astrophysics; Nucleosynthesis in explosive environments; r process; 59 ≤ A ≤ 89; Spectrometers & spectroscopic techniques

Citation Formats

Reiter, M. P., Ayet San Andrés, S., Nikas, S., Lippuner, J., Andreoiu, C., Babcock, C., Barquest, B. R., Bollig, J., Brunner, T., Dickel, T., Dilling, J., Dillmann, I., Dunling, E., Gwinner, G., Graham, L., Hornung, C., Klawitter, R., Kootte, B., Kwiatkowski, A. A., Lan, Y., Lascar, D., Leach, K. G., Leistenschneider, E., Martínez-Pinedo, G., McKay, J. E., Paul, S. F., Plaß, W. R., Roberts, L., Schatz, H., Scheidenberger, C., Sieverding, A., Steinbrügge, R., Thompson, R., Wieser, M. E., Will, C., and Welch, D. Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations. United States: N. p., 2020. Web. doi:10.1103/PhysRevC.101.025803.
Reiter, M. P., Ayet San Andrés, S., Nikas, S., Lippuner, J., Andreoiu, C., Babcock, C., Barquest, B. R., Bollig, J., Brunner, T., Dickel, T., Dilling, J., Dillmann, I., Dunling, E., Gwinner, G., Graham, L., Hornung, C., Klawitter, R., Kootte, B., Kwiatkowski, A. A., Lan, Y., Lascar, D., Leach, K. G., Leistenschneider, E., Martínez-Pinedo, G., McKay, J. E., Paul, S. F., Plaß, W. R., Roberts, L., Schatz, H., Scheidenberger, C., Sieverding, A., Steinbrügge, R., Thompson, R., Wieser, M. E., Will, C., & Welch, D. Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations. United States. doi:https://doi.org/10.1103/PhysRevC.101.025803
Reiter, M. P., Ayet San Andrés, S., Nikas, S., Lippuner, J., Andreoiu, C., Babcock, C., Barquest, B. R., Bollig, J., Brunner, T., Dickel, T., Dilling, J., Dillmann, I., Dunling, E., Gwinner, G., Graham, L., Hornung, C., Klawitter, R., Kootte, B., Kwiatkowski, A. A., Lan, Y., Lascar, D., Leach, K. G., Leistenschneider, E., Martínez-Pinedo, G., McKay, J. E., Paul, S. F., Plaß, W. R., Roberts, L., Schatz, H., Scheidenberger, C., Sieverding, A., Steinbrügge, R., Thompson, R., Wieser, M. E., Will, C., and Welch, D. Mon . "Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations". United States. doi:https://doi.org/10.1103/PhysRevC.101.025803. https://www.osti.gov/servlets/purl/1603982.
@article{osti_1603982,
title = {Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r-process abundance peak in neutron-star merger calculations},
author = {Reiter, M. P. and Ayet San Andrés, S. and Nikas, S. and Lippuner, J. and Andreoiu, C. and Babcock, C. and Barquest, B. R. and Bollig, J. and Brunner, T. and Dickel, T. and Dilling, J. and Dillmann, I. and Dunling, E. and Gwinner, G. and Graham, L. and Hornung, C. and Klawitter, R. and Kootte, B. and Kwiatkowski, A. A. and Lan, Y. and Lascar, D. and Leach, K. G. and Leistenschneider, E. and Martínez-Pinedo, G. and McKay, J. E. and Paul, S. F. and Plaß, W. R. and Roberts, L. and Schatz, H. and Scheidenberger, C. and Sieverding, A. and Steinbrügge, R. and Thompson, R. and Wieser, M. E. and Will, C. and Welch, D.},
abstractNote = {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.},
doi = {10.1103/PhysRevC.101.025803},
journal = {Physical Review C},
number = 2,
volume = 101,
place = {United States},
year = {2020},
month = {2}
}

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Works referenced in this record:

The first direct double neutron star merger detection: Implications for cosmic nucleosynthesis
journal, July 2018


TITAN's digital RFQ ion beam cooler and buncher, operation and performance
journal, June 2012

  • Brunner, T.; Smith, M. J.; Brodeur, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 676
  • DOI: 10.1016/j.nima.2012.02.004

Large-scale evaluation of β -decay rates of r -process nuclei with the inclusion of first-forbidden transitions
journal, February 2016


Fingerprints of Heavy-Element Nucleosynthesis in the Late-Time Lightcurves of Kilonovae
journal, February 2019


Microscopic mass formulas
journal, July 1995


Strong one-neutron emission from two-neutron unbound states in β decays of the r -process nuclei Ga 86 , 87
journal, September 2019


The impact of uncertain nuclear masses near closed shells on the r -process abundance pattern
journal, February 2015


Dawning of the N = 32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes
journal, February 2018


Fission properties of superheavy nuclei for r -process calculations
journal, March 2018

  • Giuliani, Samuel A.; Martínez-Pinedo, Gabriel; Robledo, Luis M.
  • Physical Review C, Vol. 97, Issue 3
  • DOI: 10.1103/PhysRevC.97.034323

Neutrino-Driven Winds in the Aftermath of a Neutron star Merger: Nucleosynthesis and Electromagnetic Transients
journal, October 2015


Nuclear mass formula with Bogolyubov-enhanced shell-quenching: application to r-process
journal, October 1996


The fundamental role of fission during r-process nucleosynthesis in neutron star mergers
journal, February 2015


Binding Energy of Cu 79 : Probing the Structure of the Doubly Magic Ni 78 from Only One Proton Away
journal, November 2017


Sensitivity studies for the main r process: β-decay rates
journal, April 2014

  • Mumpower, M.; Cass, J.; Passucci, G.
  • AIP Advances, Vol. 4, Issue 4
  • DOI: 10.1063/1.4867192

Physical Conditions for the r -process. I. Radioactive Energy Sources of Kilonovae
journal, November 2018


THE r -PROCESS NUCLEOSYNTHESIS IN THE VARIOUS JET-LIKE EXPLOSIONS OF MAGNETOROTATIONAL CORE-COLLAPSE SUPERNOVAE
journal, September 2015

  • Nishimura, Nobuya; Takiwaki, Tomoya; Thielemann, Friedrich-Karl
  • The Astrophysical Journal, Vol. 810, Issue 2
  • DOI: 10.1088/0004-637X/810/2/109

Discovery of a pulsar in a binary system
journal, January 1975

  • Hulse, R. A.; Taylor, J. H.
  • The Astrophysical Journal, Vol. 195
  • DOI: 10.1086/181708

Composite uranium carbide targets at TRIUMF: Development and characterization with SEM, XRD, XRF and L-edge densitometry
journal, September 2013


The AME2016 atomic mass evaluation (II). Tables, graphs and references
journal, March 2017


The AME2016 atomic mass evaluation (I). Evaluation of input data; and adjustment procedures
journal, March 2017


The NUBASE2016 evaluation of nuclear properties
journal, March 2017


Electromagnetic Signatures of Neutron Star Mergers in the Advanced LIGO Era
journal, October 2016


The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars
journal, October 2017

  • Tanvir, N. R.; Levan, A. J.; González-Fernández, C.
  • The Astrophysical Journal, Vol. 848, Issue 2
  • DOI: 10.3847/2041-8213/aa90b6

The jina Reaclib Database: its Recent Updates and Impact on Type-I X-Ray Bursts
journal, June 2010

  • Cyburt, Richard H.; Amthor, A. Matthew; Ferguson, Ryan
  • The Astrophysical Journal Supplement Series, Vol. 189, Issue 1
  • DOI: 10.1088/0067-0049/189/1/240

Origin of the heavy elements in binary neutron-star mergers from a gravitational-wave event
journal, October 2017

  • Kasen, Daniel; Metzger, Brian; Barnes, Jennifer
  • Nature, Vol. 551, Issue 7678
  • DOI: 10.1038/nature24453

Reexamining Gamow-Teller decays near Ni 78
journal, April 2016


AN r -PROCESS KILONOVA ASSOCIATED WITH THE SHORT-HARD GRB 130603B
journal, August 2013


Swift and NuSTAR observations of GW170817: Detection of a blue kilonova
journal, October 2017


Sensitivity studies for the main r process: nuclear masses
journal, April 2014

  • Aprahamian, A.; Bentley, I.; Mumpower, M.
  • AIP Advances, Vol. 4, Issue 4
  • DOI: 10.1063/1.4867193

Quenching of the N = 32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes
journal, August 2018


The impact of individual nuclear properties on r -process nucleosynthesis
journal, January 2016

  • Mumpower, M. R.; Surman, R.; McLaughlin, G. C.
  • Progress in Particle and Nuclear Physics, Vol. 86
  • DOI: 10.1016/j.ppnp.2015.09.001

Nuclear ground-state masses and deformations: FRDM(2012)
journal, May 2016


Evolution of the N = 50 Shell Gap Energy towards Ni 78
journal, July 2008


Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron stars
journal, July 1989

  • Eichler, David; Livio, Mario; Piran, Tsvi
  • Nature, Vol. 340, Issue 6229
  • DOI: 10.1038/340126a0

A luminous blue kilonova and an off-axis jet from a compact binary merger at z = 0.1341
journal, October 2018


Electromagnetic counterparts of compact object mergers powered by the radioactive decay of r-process nuclei: Transients from compact object mergers
journal, June 2010


Nucleosynthesis in neutron-rich supernova ejecta
journal, October 1985

  • Hartmann, D.; Woosley, S. E.; El Eid, M. F.
  • The Astrophysical Journal, Vol. 297
  • DOI: 10.1086/163580

[CLC][ITAL]r[/ITAL][/CLC]-Process in Neutron Star Mergers
journal, November 1999

  • Freiburghaus, C.; Rosswog, S.; Thielemann, F. -K.
  • The Astrophysical Journal, Vol. 525, Issue 2
  • DOI: 10.1086/312343

The MR-TOF-MS isobar separator for the TITAN facility at TRIUMF
journal, May 2015

  • Jesch, Christian; Dickel, Timo; Plaß, Wolfgang R.
  • Hyperfine Interactions, Vol. 235, Issue 1-3
  • DOI: 10.1007/s10751-015-1184-2

Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
journal, October 2017


A kilonova as the electromagnetic counterpart to a gravitational-wave source
journal, October 2017

  • Smartt, S. J.; Chen, T. -W.; Jerkstrand, A.
  • Nature, Vol. 551, Issue 7678
  • DOI: 10.1038/nature24303

Sensitivity of the r-process to nuclear masses
journal, December 2012


GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
journal, October 2017


Ion-optical design of a high-performance multiple-reflection time-of-flight mass spectrometer and isobar separator
journal, May 2015

  • Yavor, Mikhail I.; Plaß, Wolfgang R.; Dickel, Timo
  • International Journal of Mass Spectrometry, Vol. 381-382
  • DOI: 10.1016/j.ijms.2015.01.002

THE ROLE OF FISSION IN NEUTRON STAR MERGERS AND ITS IMPACT ON THE r -PROCESS PEAKS
journal, July 2015


Time-of-flight mass spectrometers with multiply reflected ion trajectories
journal, April 1990

  • Wollnik, H.; Przewloka, M.
  • International Journal of Mass Spectrometry and Ion Processes, Vol. 96, Issue 3
  • DOI: 10.1016/0168-1176(90)85127-N

β -delayed neutron emission from Ga 85
journal, May 2018


Uncertainties in s-process nucleosynthesis in low-mass stars determined from Monte Carlo variations
journal, May 2018

  • Cescutti, G.; Hirschi, R.; Nishimura, N.
  • Monthly Notices of the Royal Astronomical Society, Vol. 478, Issue 3
  • DOI: 10.1093/mnras/sty1185

Transient Events from Neutron Star Mergers
journal, November 1998

  • Li, Li-Xin; Paczyński, Bohdan
  • The Astrophysical Journal, Vol. 507, Issue 1
  • DOI: 10.1086/311680

Nuclear robustness of the r process in neutron-star mergers
journal, November 2015

  • Mendoza-Temis, Joel de Jesús; Wu, Meng-Ru; Langanke, Karlheinz
  • Physical Review C, Vol. 92, Issue 5
  • DOI: 10.1103/PhysRevC.92.055805

Commissioning and initial operation of a radioactive beam ion source at ISAC
journal, February 2000

  • Dombsky, M.; Bishop, D.; Bricault, P.
  • Review of Scientific Instruments, Vol. 71, Issue 2
  • DOI: 10.1063/1.1150364

Grb 080503: Implications of a Naked Short Gamma-Ray Burst Dominated by Extended Emission
journal, April 2009


Electromagnetic Transients Powered by Nuclear Decay in the Tidal Tails of Coalescing Compact Binaries
journal, July 2011


SkyNet: A Modular Nuclear Reaction Network Library
journal, December 2017

  • Lippuner, Jonas; Roberts, Luke F.
  • The Astrophysical Journal Supplement Series, Vol. 233, Issue 2
  • DOI: 10.3847/1538-4365/aa94cb

Spectroscopic identification of r-process nucleosynthesis in a double neutron-star merger
journal, October 2017


A possible macronova in the late afterglow of the long–short burst GRB 060614
journal, June 2015

  • Yang, Bin; Jin, Zhi-Ping; Li, Xiang
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8323

A ‘kilonova’ associated with the short-duration γ-ray burst GRB 130603B
journal, August 2013

  • Tanvir, N. R.; Levan, A. J.; Fruchter, A. S.
  • Nature, Vol. 500, Issue 7464
  • DOI: 10.1038/nature12505

Isotopic r-process abundances and nuclear structure far from stability - Implications for the r-process mechanism
journal, January 1993

  • Kratz, Karl-Ludwig; Bitouzet, Jean-Philippe; Thielemann, Friedrich-Karl
  • The Astrophysical Journal, Vol. 403
  • DOI: 10.1086/172196

MAGNETOROTATIONALLY DRIVEN SUPERNOVAE AS THE ORIGIN OF EARLY GALAXY r -PROCESS ELEMENTS?
journal, April 2012


The Light Curve of the Macronova Associated with the Long–Short Burst grb 060614
journal, September 2015


r-PROCESS LANTHANIDE PRODUCTION AND HEATING RATES IN KILONOVAE
journal, December 2015


The tidal disruption of neutron stars by black holes in close binaries
journal, November 1976

  • Lattimer, J. M.; Schramm, D. N.
  • The Astrophysical Journal, Vol. 210
  • DOI: 10.1086/154860

Structure of 80 Ge revealed by the β decay of isomeric states in 80 Ga: Triaxiality in the vicinity of 78 Ni
journal, May 2013


New Half-lives of r -process Zn and Ga Isotopes Measured with Electromagnetic Separation
journal, September 2012


Dynamical time focus shift in multiple-reflection time-of-flight mass spectrometers
journal, January 2017

  • Dickel, Timo; Yavor, Mikhail I.; Lang, Johannes
  • International Journal of Mass Spectrometry, Vol. 412
  • DOI: 10.1016/j.ijms.2016.11.005

Impact of individual nuclear masses on r -process abundances
journal, September 2015


New calculations of gross β -decay properties for astrophysical applications: Speeding-up the classical r process
journal, May 2003


Systematics of Dynamical mass Ejection, Nucleosynthesis, and Radioactively Powered Electromagnetic Signals from Neutron-Star Mergers
journal, July 2013


Multi-messenger Observations of a Binary Neutron Star Merger
journal, October 2017


Resonant Ionization Laser Ion Source (RILIS) off-line developments on Ga, Al and Ca
journal, August 2013

  • Li, R.; Lassen, J.; Teigelhöfer, A.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 308
  • DOI: 10.1016/j.nimb.2013.05.005

The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
journal, September 2007


High-performance multiple-reflection time-of-flight mass spectrometers for research with exotic nuclei and for analytical mass spectrometry
journal, November 2015


An ion guide laser ion source for isobar-suppressed rare isotope beams
journal, March 2014

  • Raeder, Sebastian; Heggen, Henning; Lassen, Jens
  • Review of Scientific Instruments, Vol. 85, Issue 3
  • DOI: 10.1063/1.4868496

Black-hole-neutron-star collisions
journal, September 1974

  • Lattimer, J. M.; Schramm, D. N.
  • The Astrophysical Journal, Vol. 192
  • DOI: 10.1086/181612

Identification of strontium in the merger of two neutron stars
journal, October 2019


A high-performance multiple-reflection time-of-flight mass spectrometer and isobar separator for the research with exotic nuclei
journal, March 2015

  • Dickel, T.; Plaß, W. R.; Becker, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 777
  • DOI: 10.1016/j.nima.2014.12.094

β -Decay Half-Lives of Co 76 , 77 , Ni 79 , 80 , and Cu 81 : Experimental Indication of a Doubly Magic Ni 78
journal, July 2014