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Title: Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ) 69Ni

Neutron-capture reactions play an important role in heavy element nucleosynthesis, since they are the driving force for the two processes that create the vast majority of the heavy elements. When a neutron capture occurs on a short-lived nucleus, it is extremely challenging to study the reaction directly and therefore the use of indirect techniques is essential. The present work reports on such an indirect measurement that provides strong constraints on the 68Ni(n,g) 69Ni reaction rate.The commonly used reaction libraries JINA-REACLIB and BRUSLIB are in relatively good agreement with the experimental rate. The impact of the new rate on weak r-process calculations is discussed.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [2] ;  [6] ;  [7] ;  [2] ;  [8] ;  [7] ;  [7] ;  [9] ;  [8] ;  [1] ;  [2] ;  [2] ;  [10]
  1. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics
  2. Univ. of Oslo (Norway). Dept. of Physics
  3. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics; Michigan State Univ., East Lansing, MI (United States). Dept. of Chemistry
  4. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics
  5. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Dept. of Chemistry
  9. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Joint Inst. for Nuclear Astrophysics; Central Michigan Univ., Mount Pleasant, MI (United States). Dept. of Physics
  10. Univ. of Notre Dame, IN (United States). Dept. of Physics
Publication Date:
Report Number(s):
LLNL-JRNL-705342
Journal ID: ISSN 0954-3899
Grant/Contract Number:
NA0003221; NA0000979; NA0002132; AC52-07NA27344; AC52-06NA25396; PHY 1102511; PHY 1430152; PHY 1350234
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. G, Nuclear and Particle Physics
Additional Journal Information:
Journal Volume: 44; Journal Issue: 4; Journal ID: ISSN 0954-3899
Publisher:
IOP Publishing
Research Org:
Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1360889
Alternate Identifier(s):
OSTI ID: 1378525

Spyrou, Artemis, Larsen, Ann-Cecilie, Liddick, Sean N., Naqvi, Farheen, Crider, Benjamin, Dombos, Alexander C., Guttormsen, Magne, Bleuel, Darren, Couture, Aaron, Campo, Lucia Crespo, Lewis, Rebecca, Mosby, Shea, Mumpower, Matthew, Perdikakis, George, Prokop, Christopher J., Quinn, Stephen J., Renstrom, Theresa, Siem, Sunniva, and Surman, Rebecca. Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni. United States: N. p., Web. doi:10.1088/1361-6471/aa5ae7.
Spyrou, Artemis, Larsen, Ann-Cecilie, Liddick, Sean N., Naqvi, Farheen, Crider, Benjamin, Dombos, Alexander C., Guttormsen, Magne, Bleuel, Darren, Couture, Aaron, Campo, Lucia Crespo, Lewis, Rebecca, Mosby, Shea, Mumpower, Matthew, Perdikakis, George, Prokop, Christopher J., Quinn, Stephen J., Renstrom, Theresa, Siem, Sunniva, & Surman, Rebecca. Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni. United States. doi:10.1088/1361-6471/aa5ae7.
Spyrou, Artemis, Larsen, Ann-Cecilie, Liddick, Sean N., Naqvi, Farheen, Crider, Benjamin, Dombos, Alexander C., Guttormsen, Magne, Bleuel, Darren, Couture, Aaron, Campo, Lucia Crespo, Lewis, Rebecca, Mosby, Shea, Mumpower, Matthew, Perdikakis, George, Prokop, Christopher J., Quinn, Stephen J., Renstrom, Theresa, Siem, Sunniva, and Surman, Rebecca. 2017. "Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni". United States. doi:10.1088/1361-6471/aa5ae7. https://www.osti.gov/servlets/purl/1360889.
@article{osti_1360889,
title = {Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni},
author = {Spyrou, Artemis and Larsen, Ann-Cecilie and Liddick, Sean N. and Naqvi, Farheen and Crider, Benjamin and Dombos, Alexander C. and Guttormsen, Magne and Bleuel, Darren and Couture, Aaron and Campo, Lucia Crespo and Lewis, Rebecca and Mosby, Shea and Mumpower, Matthew and Perdikakis, George and Prokop, Christopher J. and Quinn, Stephen J. and Renstrom, Theresa and Siem, Sunniva and Surman, Rebecca},
abstractNote = {Neutron-capture reactions play an important role in heavy element nucleosynthesis, since they are the driving force for the two processes that create the vast majority of the heavy elements. When a neutron capture occurs on a short-lived nucleus, it is extremely challenging to study the reaction directly and therefore the use of indirect techniques is essential. The present work reports on such an indirect measurement that provides strong constraints on the 68Ni(n,g)69Ni reaction rate.The commonly used reaction libraries JINA-REACLIB and BRUSLIB are in relatively good agreement with the experimental rate. The impact of the new rate on weak r-process calculations is discussed.},
doi = {10.1088/1361-6471/aa5ae7},
journal = {Journal of Physics. G, Nuclear and Particle Physics},
number = 4,
volume = 44,
place = {United States},
year = {2017},
month = {2}
}