Study of the Mg(d,p)Mg reaction to constrain the Al(p,)Si resonant reaction rates in nova burning conditions
CB Hamill, PJ Woods, D Kahl, R Longland… - The European Physical …, 2020 - Springer
The European Physical Journal A, 2020•Springer
The rate of the 25 Al (p, γ) 26 Si reaction is one of the few key remaining nuclear
uncertainties required for predicting the production of the cosmic γ-ray emitter 26 Al in
explosive burning in novae. This reaction rate is dominated by three key resonances (J π=
0+, 1+ and 3+) in 26 Si. Only the 3+ resonance strength has been directly constrained by
experiment. A high resolution measurement of the 25 Mg (d, p) reaction was used to
determine spectroscopic factors for analog states in the mirror nucleus, 26 Mg. A first …
uncertainties required for predicting the production of the cosmic γ-ray emitter 26 Al in
explosive burning in novae. This reaction rate is dominated by three key resonances (J π=
0+, 1+ and 3+) in 26 Si. Only the 3+ resonance strength has been directly constrained by
experiment. A high resolution measurement of the 25 Mg (d, p) reaction was used to
determine spectroscopic factors for analog states in the mirror nucleus, 26 Mg. A first …
Abstract
The rate of the Al(p, )Si reaction is one of the few key remaining nuclear uncertainties required for predicting the production of the cosmic -ray emitter Al in explosive burning in novae. This reaction rate is dominated by three key resonances (, and ) in Si. Only the resonance strength has been directly constrained by experiment. A high resolution measurement of the Mg(d, p) reaction was used to determine spectroscopic factors for analog states in the mirror nucleus, Mg. A first spectroscopic factor value is reported for the state at 6.256 MeV, and a strict upper limit is set on the value for the state at 5.691 MeV, that is incompatible with an earlier (He, He) study. These results are used to estimate proton partial widths, and resonance strengths of analog states in Si contributing to the Al(p, )Si reaction rate in nova burning conditions.
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