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Strength measurements of the $E_{R}^{lab} = 647$ and 1842 keV resonances in the ${}^{40}{Ca} (p, γ) {}^{41}{Sc}$ reaction and their relevance in novae nucleosynthesis

https://doi.org/10.1103/PhysRevC.111.025804

Sidhu, R S; deBoer, R J; Görres, J; Wiescher, M; Koros, J; Manukyan, K; Matney, M; McDonaugh, J; Picciotto, V; Sanchez, A T; et al (February 2025, Physical Review C)

Here we report on the direct measurement of the resonance strengths of the $E_{R}^{lab} = 647 keV$ and 1842 keV resonances in the ${}^{40}{Ca} (p, γ) {}^{41}{Sc}$ reaction. At novae temperatures, $0.2 < T_{9} < 0.7$ , the ${}^{40}{Ca} (p, γ) {}^{41}{Sc}$ reaction is governed by the low energy resonance at $E_{R}^{lab} = 647 keV$ , whereas the $E_{R}^{lab} = 1842 keV$ resonance serves as a normalization standard for nuclear reaction experiments within the astrophysically relevant energy range. For the $E_{R}^{lab} = 647 keV$ resonance, we obtain a resonance strength $ω γ = (2.51 \pm 0 . 09_{stat} \pm 0 . 22_{syst}) meV$ , with an uncertainty a factor of 2.5 smaller than the previous direct measurement value. For the $E_{R}^{lab} = 1842 keV$ resonance, we obtain a resonance strength $ω γ = (0.148 \pm 0 . 006_{stat} \pm 0 . 013_{syst}) eV$ , which is consistent with previous studies but deviates by $2 σ$ from the most recent measurement. Our results suggest ${}^{40}{Ca}$ to be a strong waiting point in the nucleosynthesis path of oxygen-neon (ONe) novae. Published by the American Physical Society2025
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Free, publicly-accessible full text available February 1, 2026
Evidence for the 15Be ground state from 12Be + 3n events

https://doi.org/10.1103/PhysRevC.110.064302

Kuchera, A N; Shahid, R; Zhao, J; Edmondson, A; DeYoung, P A; Frank, N; McDonaugh, J; Peterson-Veatch, O; Rogers, W F; Redpath, T; et al (December 2024, Physical Review C)

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Comprehensive study of $d + {}^{6}{Li}$ via observing simultaneous outgoing neutrons, $γ$ rays, and charged particles

https://doi.org/10.1103/PhysRevC.110.044603

Paneru, S_N; Lee, H_Y; Prokop, C.; Kuvin, S_A; Fichtl, C.; Gastis, P.; Hale, G_M; Leal-Cidoncha, E.; Mosby, M.; Paris, M.; et al (October 2024, Physical Review C)
Measurement of the ${}^{13}C (α, n_{0}) {}^{16}O$ Differential Cross Section from 0.8 to 6.5 MeV

https://doi.org/10.1103/PhysRevLett.132.062702

deBoer, R. J.; Febbraro, M.; Bardayan, D. W.; Boomershine, C.; Brandenburg, K.; Brune, C.; Coil, S.; Couder, M.; Derkin, J.; Dede, S.; et al (February 2024, Physical Review Letters)
Neutron-unbound states in ${}^{31}{Ne}$

https://doi.org/10.1103/PhysRevC.104.034313

Chrisman, D.; Kuchera, A. N.; Baumann, T.; Blake, A.; Brown, B. A.; Brown, J.; Cochran, C.; DeYoung, P. A.; Finck, J. E.; Frank, N.; et al (September 2021, Physical Review C)

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