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Title: Key Ne 19 States Identified Affecting γ -Ray Emission from F 18 in Novae

Abstract

Detection of nuclear-decay γ rays provides a sensitive thermometer of nova nucleosynthesis. The most intense γ-ray flux is thought to be annihilation radiation from the β + decay of 18F, which is destroyed prior to decay by the 18F(p,α) 15O reaction. Estimates of 18F production had been uncertain, however, because key near-threshold levels in the compound nucleus, 19Ne, had yet to be identified. We report the first measurement of the 19F( 3He, ) 19Ne reaction, in which the placement of two long-sought 3/2 + levels is suggested via triton-γ–γ coincidences. Furthermore, the precise determination of their resonance energies reduces the upper limit of the rate by a factor of 1.5–17 at nova temperatures and reduces the average uncertainty on the nova detection probability by a factor of 2.1.

Authors:
 [1];  [1];  [2];  [2];  [3];  [2];  [4];  [1];  [5];  [5];  [6];  [7];  [5];  [8];  [8];  [3];  [2];  [3];  [9];  [1] more »;  [5];  [7];  [8];  [1];  [10];  [6];  [6];  [5];  [11];  [7];  [1];  [12];  [7];  [3];  [2];  [13];  [5] « less
  1. Univ. of Notre Dame, Notre Dame, IN (United States)
  2. Rutgers Univ., New Brunswick, NJ (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Michigan State Univ., East Lansing, MI (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Louisiana State Univ., Baton Rouge, LA (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States)
  8. Sungkyunkwan Univ., Suwon (South Korea)
  9. Univ. of Notre Dame, Notre Dame, IN (United States); Univ. of Surrey, Surrey (United Kingdom)
  10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  11. Rutgers Univ., New Brunswick, NJ (United States); Univ. of Surrey, Surrey (United Kingdom)
  12. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  13. Louisiana State Univ., Baton Rouge, LA (United States); Univ. of Massachusetts, Lowell, MA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Rutgers Univ., New Brunswick, NJ (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1495378
Alternate Identifier(s):
OSTI ID: 1493858; OSTI ID: 1510254
Grant/Contract Number:  
AC02-06CH11357; NA002132; AC05-00OR22725; FG02-96ER40963; FG02-96ER40978; NA0002132
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 5; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Nuclear reactions, nucleosynthesis, 18F.

Citation Formats

Hall, M. R., Bardayan, D. W., Baugher, T., Lepailleur, A., Pain, S. 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, K. A., Cizewski, J. A., Febbraro, M., Hall, O., Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O’Malley, P. D., Ota, S., Rasco, B. C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, R. L., Walter, D., Wilson, G. L., and Zhu, S. Key Ne19 States Identified Affecting γ-Ray Emission from F18 in Novae. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.052701.
Hall, M. R., Bardayan, D. W., Baugher, T., Lepailleur, A., Pain, S. 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, K. A., Cizewski, J. A., Febbraro, M., Hall, O., Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O’Malley, P. D., Ota, S., Rasco, B. C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, R. L., Walter, D., Wilson, G. L., & Zhu, S. Key Ne19 States Identified Affecting γ-Ray Emission from F18 in Novae. United States. doi:10.1103/PhysRevLett.122.052701.
Hall, M. R., Bardayan, D. W., Baugher, T., Lepailleur, A., Pain, S. 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, K. A., Cizewski, J. A., Febbraro, M., Hall, O., Hu, J., Jiang, C. L., Jones, K. L., Lee, E. J., O’Malley, P. D., Ota, S., Rasco, B. C., Santiago-Gonzalez, D., Seweryniak, D., Sims, H., Smith, K., Tan, W. P., Thompson, P., Thornsberry, C., Varner, R. L., Walter, D., Wilson, G. L., and Zhu, S. Thu . "Key Ne19 States Identified Affecting γ-Ray Emission from F18 in Novae". United States. doi:10.1103/PhysRevLett.122.052701.
@article{osti_1495378,
title = {Key Ne19 States Identified Affecting γ-Ray Emission from F18 in Novae},
author = {Hall, M. R. and Bardayan, D. W. and Baugher, T. and Lepailleur, A. and Pain, S. 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, K. A. and Cizewski, J. A. and Febbraro, M. and Hall, O. 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, B. 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, R. L. and Walter, D. and Wilson, G. L. and Zhu, S.},
abstractNote = {Detection of nuclear-decay γ rays provides a sensitive thermometer of nova nucleosynthesis. The most intense γ-ray flux is thought to be annihilation radiation from the β+ decay of 18F, which is destroyed prior to decay by the 18F(p,α)15O reaction. Estimates of 18F production had been uncertain, however, because key near-threshold levels in the compound nucleus, 19Ne, had yet to be identified. We report the first measurement of the 19F(3He,tγ)19Ne reaction, in which the placement of two long-sought 3/2+ levels is suggested via triton-γ–γ coincidences. Furthermore, the precise determination of their resonance energies reduces the upper limit of the rate by a factor of 1.5–17 at nova temperatures and reduces the average uncertainty on the nova detection probability by a factor of 2.1.},
doi = {10.1103/PhysRevLett.122.052701},
journal = {Physical Review Letters},
number = 5,
volume = 122,
place = {United States},
year = {2019},
month = {2}
}

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