First measurement of the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mmultiscripts><mi>Ne</mi><mprescripts></mprescripts><none></none><mn>20</mn></mmultiscripts><mo>(</mo><mi>α</mi><mo>,</mo><mi>p</mi><mo>)</mo><mmultiscripts><mi>Na</mi><mprescripts></mprescripts><none></none><mn>23</mn></mmultiscripts></mrow></math> reaction at energies relevant for type Ia supernovae

C. Boomershine; D. W. Bardayan; R. J. deBoer; P. D. O'Malley; S. R. Carmichael; L. Caves; A. Davis; A. Gula; K. Howard; R. Kelmar; A. Mitchell; L. Morales; S. Moylan; D. Robertson; E. Stech

doi:10.1103/vkcb-8hzg

First measurement of the ${}^{20}{Ne} (α, p) {}^{23}{Na}$ reaction at energies relevant for type Ia supernovae

C. Boomershine ¹, D. W. Bardayan¹, R. J. deBoer ¹, P. D. O'Malley¹, S. R. Carmichael ¹, L. Caves¹, A. Davis², A. Gula¹, K. Howard¹ et al.

R. Kelmar¹, A. Mitchell³, L. Morales¹, S. Moylan¹, D. Robertson ¹, and E. Stech ¹

¹Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA
²Department of Physics and Astronomy, Swarthmore College, Swarthmore, Pennsylvania 19081, USA
³Department of Physics, University of Southern Indiana, Evansville, Indiana 47712, USA

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Phys. Rev. C 113, 065804 – Published 11 June, 2026

DOI: https://doi.org/10.1103/vkcb-8hzg

Abstract

Sensitivity studies have found that the ${}^{20}{Ne} (α, p) {}^{23}{Na}$ reaction has a significant influence on supernovae Ia (SNIa) nucleosynthesis, but no previous measurements of the reaction cross section have been reported. Astrophysical reaction rate estimates have been based upon measurements of the inverse reaction, ${}^{23}{Na} (p, α) {}^{20}{Ne}$ , which ignores the contribution populating excited ${}^{23}{Na}$ levels. In this paper, the first measurement of the ${}^{20}{Ne} (α, p) {}^{23}{Na}$ reaction cross section is reported, and it is found that reactions populating excited ${}^{23}{Na}$ levels are important to understanding the astrophysical reaction rate especially at temperatures above 2.0 GK, which are characteristic of hotter SNIa burning. Reaction cross sections populating both the ground state and the first excited ${}^{23}{Na}$ state, astrophysical reaction rates, and uncertainties are reported.

Physical Review C

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First measurement of the ${}^{20}{Ne} (α, p) {}^{23}{Na}$ reaction at energies relevant for type Ia supernovae

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First measurement of the Ne20(α,p)Na23 reaction at energies relevant for type Ia supernovae

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First measurement of the ${}^{20}{Ne} (α, p) {}^{23}{Na}$ reaction at energies relevant for type Ia supernovae