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

M. P. Reiter; S. Ayet San Andrés; S. Nikas; J. Lippuner; C. Andreoiu; C. Babcock; B. R. Barquest; J. Bollig; T. Brunner; T. Dickel; J. Dilling; I. Dillmann; E. Dunling; G. Gwinner; L. Graham; C. Hornung; R. Klawitter; B. Kootte; A. A. Kwiatkowski; Y. Lan; D. Lascar; K. G. Leach; E. Leistenschneider; G. Martínez-Pinedo; J. E. McKay; S. F. Paul; W. R. Plaß; L. Roberts; H. Schatz; C. Scheidenberger; A. Sieverding; R. Steinbrügge; R. Thompson; M. E. Wieser; C. Will; D. Welch

doi:10.1103/PhysRevC.101.025803

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

M. P. Reiter, S. Ayet San Andrés, S. Nikas, J. Lippuner, C. Andreoiu, C. Babcock, B. R. Barquest, J. Bollig, T. Brunner, T. Dickel, J. Dilling, I. Dillmann, E. Dunling, G. Gwinner, L. Graham, C. Hornung, R. Klawitter, B. Kootte, A. A. Kwiatkowski, Y. LanD. Lascar, K. G. Leach, E. Leistenschneider, G. Martínez-Pinedo, J. E. McKay, S. F. Paul, W. R. Plaß, L. Roberts, H. Schatz, C. Scheidenberger, A. Sieverding, R. Steinbrügge, R. Thompson, M. E. Wieser, C. Will, D. Welch

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Abstract

We report mass measurements of neutron-rich Ga isotopes Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga84 and Ga85 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.

Original language	English
Article number	025803
Journal	Physical Review C
Volume	101
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.101.025803
State	Published - Feb 2020
Externally published	Yes

Funding

The authors thank the TRILIS group at TRIUMF for Ga beam development and beautiful operation of the IG-LIS ion source and J. Bergmann for the Massdata-Acquisition software package used for the MR-TOF-MS, and discussions with F.-K. Thielemann are also acknowledged. This work was partially supported by Canadian agencies NSERC and CFI, U.S.A. NSF (Grants No. PHY-1419765 and No. PHY-1614130) and DOE (Grant No. DE-SC0017649), Brazil's CNPq (Grant No. 249121/2013-1), United Kingdom's STFC (Grants No. ST/L005816/1 and No. ST/L005743/1), the Canada-UK Foundation, German institutions DFG (Grants No. FR 601/3-1 and No. SFB 1245 and through PRISMA Cluster of Excellence), BMBF (Grants No. 05P15RGFN1 and No. 05P12RGFN8), the Helmholtz Association through NAVI (Grant No. VH-VI-417), HMWK through the LOEWE Center HICforFAIR, by the JLU and GSI under the JLU-GSI strategic Helmholtz partnership agreement, the ChETEC COST Action (CA16117) supported by COST (European Cooperation in Science and Technology), and the Los Alamos National Laboratory and has been assigned report number LA-UR-18-28439. Los Alamos National Laboratory is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of US Department of Energy (Contract No. DEAC52-06NA25396). TRIUMF receives federal funding via NRC-CNRC.

Funders	Funder number
Canadian agencies NSERC
HMWK
National Science Foundation	1419765, PHY-1419765, PHY-1614130
National Science Foundation
U.S. Department of Energy	DE-SC0017649
U.S. Department of Energy
Los Alamos National Laboratory	LA-UR-18-28439
Los Alamos National Laboratory
Justus Liebig Universität Gießen
Science and Technology Facilities Council	ST/L005743/1, ST/L005816/1
Science and Technology Facilities Council
European Cooperation in Science and Technology
Deutsche Forschungsgemeinschaft	FR 601/3-1, SFB 1245
Deutsche Forschungsgemeinschaft
Canada Foundation for Innovation
Bundesministerium für Bildung und Forschung	05P15RGFN1, 05P12RGFN8
Bundesministerium für Bildung und Forschung
Conselho Nacional de Desenvolvimento Científico e Tecnológico	249121/2013-1
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Helmholtz Association	VH-VI-417
Helmholtz Association
GSI Helmholtzzentrum für Schwerionenforschung GmbH	CA16117
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Foundation for Canadian Studies in the United Kingdom

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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., ... Welch, D. (2020). Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations. Physical Review C, 101(2), Article 025803. https://doi.org/10.1103/PhysRevC.101.025803

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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 Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga84 and Ga85 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.",

author = "Reiter, {M. P.} and {Ayet San Andr{\'e}s}, S. and S. Nikas and J. Lippuner and C. Andreoiu and C. Babcock and Barquest, {B. R.} and J. Bollig and T. Brunner and T. Dickel and J. Dilling and I. Dillmann and E. Dunling and G. Gwinner and L. Graham and C. Hornung and R. Klawitter and B. Kootte and Kwiatkowski, {A. A.} and Y. Lan and D. Lascar and Leach, {K. G.} and E. Leistenschneider and G. Mart{\'i}nez-Pinedo and McKay, {J. E.} and Paul, {S. F.} and Pla{\ss}, {W. R.} and L. Roberts and H. Schatz and C. Scheidenberger and A. Sieverding and R. Steinbr{\"u}gge and R. Thompson and Wieser, {M. E.} and C. Will and D. Welch",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = feb,

doi = "10.1103/PhysRevC.101.025803",

language = "English",

volume = "101",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

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Reiter, MP, Ayet San Andrés, S, Nikas, S, Lippuner, J, Andreoiu, C, Babcock, C, Barquest, BR, Bollig, J, Brunner, T, Dickel, T, Dilling, J, Dillmann, I, Dunling, E, Gwinner, G, Graham, L, Hornung, C, Klawitter, R, Kootte, B, Kwiatkowski, AA, Lan, Y, Lascar, D, Leach, KG, Leistenschneider, E, Martínez-Pinedo, G, McKay, JE, Paul, SF, Plaß, WR, Roberts, L, Schatz, H, Scheidenberger, C, Sieverding, A, Steinbrügge, R, Thompson, R, Wieser, ME, Will, C & Welch, D 2020, 'Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations', Physical Review C, vol. 101, no. 2, 025803. https://doi.org/10.1103/PhysRevC.101.025803

TY - JOUR

T1 - Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations

AU - Reiter, M. P.

AU - Ayet San Andrés, S.

AU - Nikas, S.

AU - Lippuner, J.

AU - Andreoiu, C.

AU - Babcock, C.

AU - Barquest, B. R.

AU - Bollig, J.

AU - Brunner, T.

AU - Dickel, T.

AU - Dilling, J.

AU - Dillmann, I.

AU - Dunling, E.

AU - Gwinner, G.

AU - Graham, L.

AU - Hornung, C.

AU - Klawitter, R.

AU - Kootte, B.

AU - Kwiatkowski, A. A.

AU - Lan, Y.

AU - Lascar, D.

AU - Leach, K. G.

AU - Leistenschneider, E.

AU - Martínez-Pinedo, G.

AU - McKay, J. E.

AU - Paul, S. F.

AU - Plaß, W. R.

AU - Roberts, L.

AU - Schatz, H.

AU - Scheidenberger, C.

AU - Sieverding, A.

AU - Steinbrügge, R.

AU - Thompson, R.

AU - Wieser, M. E.

AU - Will, C.

AU - Welch, D.

PY - 2020/2

Y1 - 2020/2

N2 - We report mass measurements of neutron-rich Ga isotopes Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga84 and Ga85 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.

AB - We report mass measurements of neutron-rich Ga isotopes Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga84 and Ga85 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.

UR - http://www.scopus.com/inward/record.url?scp=85079818312&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.101.025803

DO - 10.1103/PhysRevC.101.025803

M3 - Article

AN - SCOPUS:85079818312

SN - 2469-9985

VL - 101

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 025803

ER -

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

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