Study of the Mg(d,p)Mg reaction to constrain the Al(p,)Si resonant reaction rates in nova burning conditions

C. B. Hamill; P. J. Woods; D. Kahl; R. Longland; J. P. Greene; C. Marshall; F. Portillo; K. Setoodehnia

doi:10.1140/epja/s10050-020-00052-9

EPJ

Study of the ${{^{25}}}$ Mg(d,p) ${{^{26}}}$ Mg reaction to constrain the ${{^{25}}}$ Al(p, ${\gamma }$ ) ${{^{26}}}$ Si resonant reaction rates in nova burning conditions

C. B. Hamill¹^*, P. J. Woods¹, D. Kahl¹, R. Longland²^,3, J. P. Greene⁴, C. Marshall²^,3, F. Portillo²^,3 and K. Setoodehnia²^,3^,5

¹ School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Edinburgh, EH9 3FD, UK
² Department of Physics, North Carolina State University, Raleigh, NC, 27695, USA
³ Triangle Universities Nuclear Laboratory, Duke University, Durham, NC, 27710, USA
⁴ Physics Division, Argonne National Laboratory, Argonne, IL, 60439, USA
⁵ Present address: European X-ray Free Electron Laser GmbH, Holzkoppel, 22869, Schenefeld, Germany

Received: 23 October 2019
Accepted: 26 December 2019
Published online: 5 February 2020

Abstract

The rate of the $^{25}$ Al(p, $\gamma$ ) $^{26}$ Si reaction is one of the few key remaining nuclear uncertainties required for predicting the production of the cosmic $\gamma$ -ray emitter $^{26}$ Al in explosive burning in novae. This reaction rate is dominated by three key resonances ( $J^{\pi }=0^{+}$ , $1^{+}$ 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 spectroscopic factor value is reported for the $0^{+}$ state at 6.256 MeV, and a strict upper limit is set on the value for the $1^{+}$ state at 5.691 MeV, that is incompatible with an earlier ( $^{4}$ He, $^{3}$ He) study. These results are used to estimate proton partial widths, and resonance strengths of analog states in $^{26}$ Si contributing to the $^{25}$ Al(p, $\gamma$ ) $^{26}$ Si reaction rate in nova burning conditions.

15th European Conference on Atoms Molecules and Photons (ECAMP)
June 30 to July 4, 2025
Innsbruck, Austria

EPJ

Study of the Mg(d,p)Mg reaction to constrain the Al(p,)Si resonant reaction rates in nova burning conditions

Conference announcements

Study of the ${{^{25}}}$ Mg(d,p) ${{^{26}}}$ Mg reaction to constrain the ${{^{25}}}$ Al(p, ${\gamma }$ ) ${{^{26}}}$ Si resonant reaction rates in nova burning conditions