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Spin assignments for $$^{23}\hbox {Mg}$$ levels and the astrophysical $$^{22}\hbox {Na}(p,\gamma )^{23}\hbox {Mg}$$ reaction

Journal Article · · European Physical Journal. A
 [1];  [2];  [3];  [4];  [5];  [6];  [6];  [7];  [8];  [6];  [9];  [6];  [10];  [11];  [10];  [6];  [10];  [6]
  1. Sungkyunkwan Univ., Suwon (Korea); Rutgers University
  2. Sungkyunkwan Univ., Suwon (Korea)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Univ. of Notre Dame, IN (United States)
  5. Colorado School of Mines, Golden, CO (United States)
  6. Rutgers Univ., New Brunswick, NJ (United States)
  7. Tennessee Technological Univ., Cookeville, TN (United States)
  8. Ulsan National Inst. of Science and Technology (UNIST) (Korea)
  9. Louisiana State Univ., Baton Rouge, LA (United States)
  10. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  11. Oak Ridge Associated Univ., Oak Ridge, TN (United States)
+ Show Author Affiliations

The 22Na(p,γ)23Mg reaction is responsible for destruction of the long-lived radionuclide 22Na produced during nova explosions. Since the reaction proceeds through resonances from levels in 23Mg above the proton threshold at 7.581 MeV, the properties of these levels such as excitation energies, spins, and parities are crucial ingredients to deter- mine the 22Na(p,γ)23Mg reaction rate. Despite recent studies of these levels, their spins are not well constrained in many cases. We have measured the 24Mg(p,d)23Mg transfer reaction to determine spectroscopic properties of these levels at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. The spin of the Ex = 7.788 MeV level in 23Mg is constrained to be Jπ = (3/2+, 5/2+) through the present work. Here, the astrophysical 22Na(p,γ)23Mg reaction rate at nova temperatures is updated accordingly. Nova nucleosynthesis model calculations using the newly updated 22Na(p,γ)23Mg reaction rate shows that the final weighted abundance of the radionuclide 22Na is increased by 42% compared to that obtained by using the previous 22Na(p,γ)23Mg reaction rate of Sallaska et al. for a 1.35 M⊙ ONeMg white dwarf.

Research Organization:
Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation
Grant/Contract Number:
NA0003897; FG02-96ER40955; AC05-00OR22725
OSTI ID:
1755890
Alternate ID(s):
OSTI ID: 22898639
Journal Information:
European Physical Journal. A, Journal Name: European Physical Journal. A Journal Issue: 4 Vol. 56; ISSN 1434-6001
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS