Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session X12: Nuclear Astrophysics II
10:45 AM–12:21 PM,
Tuesday, April 16, 2019
Sheraton
Room: Plaza Court 1
Sponsoring
Unit:
DNP
Chair: Jeff Blackmon, Louisiana State University
Abstract: X12.00002 : First measurement of low-energy resonances in the $^{24}$Mg($\alpha$,$p\gamma$)$^{27}$Al reaction*
10:57 AM–11:09 AM
Presenter:
Tan Ahn
(University of Notre Dame)
Authors:
Tan Ahn
(University of Notre Dame)
Sebastian Aguilar
(University of Notre Dame)
Richard J DeBoer
(University of Notre Dame)
Daniel W Bardayan
(University of Notre Dame)
Axel Boeltzig
(University of Notre Dame)
Carl Richard Brune
(Ohio University)
Sean P Burcher
(University of Tennessee)
Kyungyuk Chae
(Sungkyunkwan University)
Samuel Henderson
(University of Notre Dame)
Kate L Jones
(University of Tennessee)
Jerome Kovoor
(University of Tennessee)
Kevin Macon
(University of Notre Dame)
Khachatur Manukyan
(University of Notre Dame)
Shea Mosby
(Los Alamos National Laboratory)
Patrick D O'Malley
(University of Notre Dame)
Maxime Renaud
(University of Notre Dame, KU Leuven)
Karl Smith
(Los Alamos National Laboratory)
Wanpeng Tan
(University of Notre Dame)
Bryant J Vande Kolk
(University of Notre Dame)
Michael C F Wiescher
(University of Notre Dame)
present reaction rate relies exclusively on the inverse reaction. We have performed the first measurement of the $^{24}$Mg($\alpha,p\gamma$)$^{27}$Al reaction extracting the cross sections for the ($\alpha$,$p_1$) and ($\alpha$,$p_2$) channels. The LaBr$_3$ Array HAGRiDÂ was used to detect de-excitation $\gamma$ 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 $^{27}$Al + $p$ 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.
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