Proton branching ratios of 23Mg levels

Kim, C. H.; Chae, K. Y.; Ahn, S.; Bardayan, D. W.; Chipps, Kelly A.; Cizewski, J. A.; Howard, M. E.; Kozub, R. L.; Kwag, M. S.; Kwak, K.; Manning, B.; Matos, M.; O'Malley, Patrick D.; Pain, Steven D.; Peters, W. A.; Pittman, Stephen T.; Ratkiewicz, A.; Smith, Michael S.; Strauss, S.

doi:10.1103/physrevc.105.025801

Proton branching ratios of ²³Mg levels

Journal Article · Sun Feb 06 23:00:00 EST 2022 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.105.025801· OSTI ID:1870220

^[1]; ^[1]; Ahn, S. ^[2]; Bardayan, D. W. ^[3]; ^[4]; Cizewski, J. A. ^[5]; Howard, M. E. ^[5]; ^[6]; Kwag, M. S. ^[1]; ^[7]; Manning, B. ^[5]; Matos, M. ^[8]; O'Malley, Patrick D. ^[9]; ^[10]; Peters, W. A. ^[11]; Pittman, Stephen T. ^[10]; Ratkiewicz, A. ^[5]; ^[10]; Strauss, S. ^[9]

Sungkyunkwan Univ., Suwon (Republic of Korea). Dept. of Physics
Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Notre Dame, IN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Colorado School of Mines, Golden, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Rutgers Univ., New Brunswick, NJ (United States)
Tennessee Technological Univ., Cookeville, TN (United States)
Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
Louisiana State Univ., Baton Rouge, LA (United States)
Rutgers Univ., New Brunswick, NJ (United States); Univ. of Notre Dame, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)

Background: The anomalous ²²Ne abundance measured in certain presolar graphite grains is thought to arise from the decay of ²²Na that was synthesized at high temperatures in core-collapse supernovae. To better interpret this abundance anomaly, the primary destruction mechanism of ²²Na, the ²²Na(p,γ)²³Mg reaction, must be better understood. Purpose: Determine proton branching ratios of several ²³Mg excited states that play a role in the high-temperature ²²Na(p,γ)²³Mg reaction rate. Methods: Particle decays of ²³Mg excited states populated with the previously reported ²⁴Mg(p,d)²³Mg transfer reaction measurement [Kwag et al., Eur. Phys. J. A 56, 108 (2020)] were analyzed to extract proton branching ratios. The reaction was studied using a 31-MeV proton beam from the Holifield Radioactive Ion Beam Facility of Oak Ridge National Laboratory and ²⁴Mg solid targets. Results: Proton branching ratios of several ²³Mg excited states in the energy range of Ex = 8.044 - 9.642 MeV were experimentally determined for the first time for the p0 and p1'(p1+p2+p3) decay channels. Conclusions: These new branching ratios for²³Mg levels can provide an experimental foundation for an improved high-temperature rate of the ²²Na(p,γ)²³Mg reaction needed to understand production of anomalously high ²²Ne abundance in core-collapse supernovae.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Research Foundation of Korea (NRF); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); Institute for Basic Science

Grant/Contract Number:: AC05-00OR22725; FG52-08NA28552; FG02-96ER40955; FG02-96ER40983

OSTI ID:: 1870220

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 105; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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