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Title: New γ -ray transitions observed in Ne 19 with implications for the O 15 ( α , γ ) Ne 19 reaction rate

Abstract

The 15O(α,γ) 19Ne reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between E x=4 and 5 MeV in 19Ne is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2 - and 7/2 -, respectively. γ-ray transitions from these states were studied using triton-γ – γ coincidences from the 19F( 3He,tγ) 19Ne reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the J π values are actually 7/2 - and 9/2 -, respectively. These assignments are consistent with the values in the 19F mirror nucleus and in contrast to previously accepted assignments.

Authors:
 [1];  [1];  [2];  [2]; ORCiD logo [3];  [2];  [4];  [1];  [5];  [5];  [6];  [7];  [5];  [8];  [8]; ORCiD logo [3];  [2]; ORCiD logo [3];  [9];  [1] more »;  [5];  [7];  [8];  [1];  [10];  [6];  [6];  [5];  [7];  [7];  [1];  [11];  [7]; ORCiD logo [3];  [2];  [12];  [5] « less
  1. Univ. of Notre Dame, IN (United States). Dept. of Physics
  2. Rutgers Univ., New Brunswick, NJ (United States). Dept. of Physics and Astronomy
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division
  4. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  6. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
  7. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  8. Sungkyunkwan Univ., Suwon (South Korea). Dept. of Physics
  9. Univ. of Notre Dame, IN (United States). Dept. of Physics; Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
  10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physics Division
  11. Sungkyunkwan Univ., Suwon (South Korea). Dept. of Physics; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  12. Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy; Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics and Applied Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1506778
Alternate Identifier(s):
OSTI ID: 1504532
Grant/Contract Number:  
AC05-00OR22725; NA002132; FG02-96ER40963; FG02-96ER40978; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Hall, Matt R., Bardayan, D. W., Baugher, T., Lepailleur, Alexandre A., Pain, Steven D., Ratkiewicz, A., Ahn, S., Allen, J. M., Anderson, J. T., Ayangeakaa, A. D., Blackmon, J. C., Burcher, S., Carpenter, M. P., Cha, S. M., Chae, K. Y., Chipps, Kelly A., Cizewski, J. A., Febbraro, Michael T., Hall, Oscar, Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O'Malley, P. D., Ota, S., Rasco, Bertis C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, Robert L., Walter, D., Wilson, G. L., and Zhu, S. New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.99.035805.
Hall, Matt R., Bardayan, D. W., Baugher, T., Lepailleur, Alexandre A., Pain, Steven D., Ratkiewicz, A., Ahn, S., Allen, J. M., Anderson, J. T., Ayangeakaa, A. D., Blackmon, J. C., Burcher, S., Carpenter, M. P., Cha, S. M., Chae, K. Y., Chipps, Kelly A., Cizewski, J. A., Febbraro, Michael T., Hall, Oscar, Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O'Malley, P. D., Ota, S., Rasco, Bertis C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, Robert L., Walter, D., Wilson, G. L., & Zhu, S. New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate. United States. doi:10.1103/PhysRevC.99.035805.
Hall, Matt R., Bardayan, D. W., Baugher, T., Lepailleur, Alexandre A., Pain, Steven D., Ratkiewicz, A., Ahn, S., Allen, J. M., Anderson, J. T., Ayangeakaa, A. D., Blackmon, J. C., Burcher, S., Carpenter, M. P., Cha, S. M., Chae, K. Y., Chipps, Kelly A., Cizewski, J. A., Febbraro, Michael T., Hall, Oscar, Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O'Malley, P. D., Ota, S., Rasco, Bertis C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, Robert L., Walter, D., Wilson, G. L., and Zhu, S. Fri . "New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate". United States. doi:10.1103/PhysRevC.99.035805.
@article{osti_1506778,
title = {New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate},
author = {Hall, Matt R. and Bardayan, D. W. and Baugher, T. and Lepailleur, Alexandre A. and Pain, Steven D. and Ratkiewicz, A. and Ahn, S. and Allen, J. M. and Anderson, J. T. and Ayangeakaa, A. D. and Blackmon, J. C. and Burcher, S. and Carpenter, M. P. and Cha, S. M. and Chae, K. Y. and Chipps, Kelly A. and Cizewski, J. A. and Febbraro, Michael T. and Hall, Oscar and Hu, J. and Jiang, C. L. and Jones, K. L. and Lee, E. J. and O'Malley, P. D. and Ota, S. and Rasco, Bertis C. and Santiago-Gonzalez, D. and Seweryniak, D. and Sims, H. and Smith, K. and Tan, W. P. and Thompson, P. and Thornsberry, C. and Varner, Robert L. and Walter, D. and Wilson, G. L. and Zhu, S.},
abstractNote = {The 15O(α,γ) 19Ne reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in 19Ne is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ – γ coincidences from the 19F(3He,tγ) 19Ne reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the Jπ values are actually 7/2- and 9/2-, respectively. These assignments are consistent with the values in the 19F mirror nucleus and in contrast to previously accepted assignments.},
doi = {10.1103/PhysRevC.99.035805},
journal = {Physical Review C},
number = 3,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

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