First measurement of low-energy resonances in the 24Mg(α, pγ)27Al reaction
Abstract
Type Ia X-ray Bursts are energetic explosive events that we observe and understand through their light curves. The energy they generate comes from a complex network of nuclear reactions and a recent sensitivity study by Iliadis et al. finds that the 24Mg(α, p)27Al reaction strongly affects the global energy release. Data on the direct measurement are scarce and the present reaction rate relies exclusively on the inverse reaction. We have performed the first measurement of the 24Mg(α , pγ)27Al reaction extracting the cross sections for the (α,p1) and (α,p2) channels. The LaBr3 Array HAGRiD was used to detect de-excitation γ rays at 7 unique angles in order to measure the differential cross section over a center-of-mass energy range from 3.4 MeV to 4.6 MeV. The resulting cross sections are then analyzed in terms of an R-matrix analysis in conjunction with previously measured 27Al + p data that cover a similar excitation energy range. The results of this study will be presented and the use of this technique for future studies will be highlighted.
This work was supported by the U.S. National Science Foundation and U.S. Department of Energy National Nuclear Security Administration and Office of Nuclear Physics.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRX12002A