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Title: Measurement of the E r c . m . = 259  keV resonance in the N 14 ( p , γ ) O 15 reaction

Abstract

The N 14 ( p , γ ) O 15 reaction regulates the power generated by the CN cycle and thus impacts the structure and evolution of every star at some point in its life. The lowest positive-energy resonance in this reaction is located at E r c . m . = 259 keV, too high in energy to strongly influence quiescent stellar burning. Yet, the strength of this resonance is used as a cross-section normalization for lower-energy measurements of this reaction. We report on new measurements of the energy, strength, and γ -ray branching ratios for the 259-keV resonance, using different detection and data-analysis schemes. We have also reevaluated previous results, where possible. Our proposed recommended strength of ω γ = 12.6 ( 3 ) meV is in agreement with the previous value of 13.1(6) meV, but is more precise and thus provides a more reliable normalization for low-energy ( p , γ ) measurements.

Authors:
 [1];  [2];  [2];  [3];  [3];  [4]
  1. NASA Marshall Space Flight Center (MSFC), Huntsville, AL (United States); Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
  3. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Nordion, Kanata, ON (Canada)
Publication Date:
Research Org.:
University of North Carolina, Chapel Hill, NC (United States); Krell Institute, Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1600488
Alternate Identifier(s):
OSTI ID: 1328611
Grant/Contract Number:  
FG02-97ER41041; FC52-08NA28752
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; 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; 79 ASTRONOMY AND ASTROPHYSICS; experimental nuclear astrophysics

Citation Formats

Daigle, S., Kelly, K. J., Champagne, A. E., Buckner, M. Q., Iliadis, C., and Howard, C. Measurement of the Erc.m.=259  keV resonance in the N14(p,γ)O15 reaction. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.025803.
Daigle, S., Kelly, K. J., Champagne, A. E., Buckner, M. Q., Iliadis, C., & Howard, C. Measurement of the Erc.m.=259  keV resonance in the N14(p,γ)O15 reaction. United States. https://doi.org/10.1103/PhysRevC.94.025803
Daigle, S., Kelly, K. J., Champagne, A. E., Buckner, M. Q., Iliadis, C., and Howard, C. Mon . "Measurement of the Erc.m.=259  keV resonance in the N14(p,γ)O15 reaction". United States. https://doi.org/10.1103/PhysRevC.94.025803. https://www.osti.gov/servlets/purl/1600488.
@article{osti_1600488,
title = {Measurement of the Erc.m.=259  keV resonance in the N14(p,γ)O15 reaction},
author = {Daigle, S. and Kelly, K. J. and Champagne, A. E. and Buckner, M. Q. and Iliadis, C. and Howard, C.},
abstractNote = {The N14(p,γ)O15 reaction regulates the power generated by the CN cycle and thus impacts the structure and evolution of every star at some point in its life. The lowest positive-energy resonance in this reaction is located at Erc.m.=259 keV, too high in energy to strongly influence quiescent stellar burning. Yet, the strength of this resonance is used as a cross-section normalization for lower-energy measurements of this reaction. We report on new measurements of the energy, strength, and γ-ray branching ratios for the 259-keV resonance, using different detection and data-analysis schemes. We have also reevaluated previous results, where possible. Our proposed recommended strength of ωγ=12.6(3) meV is in agreement with the previous value of 13.1(6) meV, but is more precise and thus provides a more reliable normalization for low-energy (p,γ) measurements.},
doi = {10.1103/PhysRevC.94.025803},
journal = {Physical Review C},
number = 2,
volume = 94,
place = {United States},
year = {Mon Aug 22 00:00:00 EDT 2016},
month = {Mon Aug 22 00:00:00 EDT 2016}
}

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Works referencing / citing this record:

Resonance strengths in the N 14 ( p , γ ) O 15 astrophysical key reaction measured with activation
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