Cross section measurements and R-Matrix analyses of the $^{24}$Mg($\alpha,p\gamma$)$^{27}$Al and $^{27}$Al($p,\alpha\gamma$)$^{24}$Mg reactions with HAGRiD

S. Aguilar; T. Ahn; A. Boeltzig; S. Mukhopadhyay; R. J. DeBoer; Katherine Jones; K. T. Macon

Cross section measurements and R-Matrix analyses of the $^{24}$Mg($\alpha,p\gamma$)$^{27}$Al and $^{27}$Al($p,\alpha\gamma$)$^{24}$Mg reactions with HAGRiD

ORAL

Abstract

Alpha-induced reactions have been identified as playing an important role in various astrophysical phenomena. Sensitivity studies have indicated the $^{24}$Mg($\alpha,p$)$^{27}$Al reaction is important in understanding the energy generation in Type Ia X-ray bursts; therefore precise cross section measurements are needed. The $^{24}$Mg($\alpha,p$)$^{27}$Al cross section has not been measured directly, and no data is available for the inelastic channels which may contribute to its reaction rate. Present $^{24}$Mg($\alpha,p$)$^{27}$Al reaction rates rely exclusively on the inverse $^{27}$Al$(p,\alpha)^{24}$Mg cross section. The direct $(\alpha,p)$ and inverse $(p,\alpha)$ reactions have been performed at the University of Notre Dame's Nuclear Science Laboratory using the 5U Sta. ANA accelerator to produce a high-intensity beam with high energy resolution, providing new precision cross section measurements. The LaBr$_3$ Hybrid Array of Gamma Ray Detectors (HAGRiD) was utilized to span seven unique angles to detect the secondary $\gamma$ rays in the inelastic channels. R-Matrix analyses of the cross sections using secondary $\gamma$ rays and the inelastic channels effect on reaction rates will be presented.

Oct. 16, 2019, 9:54 AM – Oct. 16, 2019, 10:06 AM

Authors

S. Aguilar

University of Notre Dame
T. Ahn

University of Notre Dame
A. Boeltzig

University of Notre Dame
S. Mukhopadhyay

Univ. of Oslo, TU Dresden, J Hopkins Univ. Applied Physics Lab, NSCL, Ohio University, Univ. of Frankfurt, Hope College, LANL, Mississippi State Univ., Univ. of Delhi, Univ. of Notre Dame, TAMU, LLNL, Instituto de Fisica Corpuscular, Mississippi State University, University of Victoria, University of Notre Dame, Michigan State University, ELI-NP, MIT, James Madison University, Washington University, St. Louis, UNC - Chapel Hill and TUNL, Duke University and TUNL, Lawrence Livermore National Laboratory, Department of Physics, North Carolina State University, Center for Theoretical As- trophysics, Los Alamos National Laboratory, Department of Physics, North Carolina State University,, Department of Physics and Columbia Astrophysics Laboratory, Columbia University, Los Alamos National Laboratory, North Carolina State University, Columbia University, Northwestern Univ, Soreq NRC, Lawrence Livermore Natl Lab, The Racah Institute of Physics, The Hebrew University of Jerusalem, University of Tennessee, Knoxville, National Institute of Standards and Technology, Texas A&M University, Agile Technologies, Inc., University of Kentucky, Tennessee Technological University, University of Tennessee, Louisiana State University / Argonne National Laboratory, Argonne National Laboratory, Florida State University, National Superconducting Cyclotron Laboratory, Oak Ridge National Laboratory, Institut fur Theoretische Physik II, Univ. Erlangen-Nurnberg, Erlangen, Germany, TRIUMF, Vancouver, BC, Canada, Physics Division, Oak Ridge National Lab., Oak Ridge, TN 37831, USA, Technische Univ. Darmstadt, 64289 Darmstadt, Germany, National Superconducting Cyclotron Lab., MSU, East Lansing, MI 48824, Dept. of Chemistry, Augustana Univ., Sioux Falls, SD 57197, USA, University of Maryland, Baltimore County, California State University, Northridge, Bethel University, University of Minnesota Duluth, Vassar College, University of Wisconsin-Madison, Wittenberg University, Duke University, Tsinghua University, Joint Institute for Nuclear Research, Lawrence Berkeley National Lab, Vanderbilt University, University of Alabama, None, University of Michigan, Rutgers University, GANIL, Indiana University Bloomington, Duke University/Triangle Universities Nuclear Laboratory, MSU, NSCL, Rutgers Univ., ORNL, Univ. of Tennessee Knoxville, Institut d'Astronomie et d'Astrophysique, ULB, 1050 Brussels, Belgium, TUNL, Durham, NC 27708, USA \& University of North Carolina at Chapel Hill, Chapel Hill, NC 27516, USA, Department of Physics and Astronomy, James Madison University, Harrisonburg, VA 22807, USA, University of California Berkeley, Central Michigan University, University of Oslo, Utah State University, Institute of Theoretical Physics and Astronomy, Vilnius University, Forschungszentrum Julich, Bonn University, Jefferson Lab, Temple University, ANU, TRIUMF, UML, BNL, Institut fur Kernphysik der Universitat zu Koln, Ruder Boskovic Institute, University of York, Michigan State University/NSCL, University of Surrey, National Superconducting Cyclotron Laboratory, MSU, Lawrence Berkeley National Laboratory, Research Center for Nuclear Astrophysics, Universität zu Köln, University of Massachusetts, Lowell, Simon Fraser University, Albion College, Massachusetts Institute of Technology, Old Dominion University, IPN-Orsay, The Catholic University of America, OU, MPIK, WMU, CMU, UCB, MSU, Notre Dame, UOslo, MissSU, NSCL / MSU, Rutgers, George Washington University, William and Mary, Thomas Jefferson National Accelerator Facility, CERN, Old Dominion University & Jefferson Lab, University of Maryland, College Park, Cyclotron Institute, Texas A&M University, TX, 77840, Department of Chemistry, Washington University, St. Louis, Missouri, IRFU, CEA, Saclay, Gif-Sur-Ivette, France, LSU, CSM, Tenn. Tech., Tennessee, Notre Dame University, Texas A\&M University, Lawerence Livermore National Laboratory, University of Tennessee Knoxville/Oak Ridge National Laboratory, FSU, U. Surrey, CSNSM-Orsay, JYFL-Jyvaskyla, ANL, VECC-Kolkata, U. Manchester, UMass Lowell, Louisiana State University, Daresbury Laboratory, University of Liverpool, University of North Carolina/TUNL, United States Naval Academy, Jefferson Lab/Old Dominion University, Penn State Berks/Jefferson Lab, Lebanon Valley College, UCLA, Penn State Berks, Lebanon Valley College/College of William and Mary, San Diego State University, Los Alamos National Lab, University of Illinois at Urbana-Champaign, Pennsylvania State University, Tel Aviv University, Stony Brook University, Brookhaven National Laboratory, Technical University of Munich, Germany, Mississippi State University, USA, UC Berkeley, UC Irvine, UNC/TUNL, Colorado School of Mines, Tennessee Technical University, Australian Natl Univ, iThemba LABS, iThemba LABS, and University of Stellenbosch, iThemba LABS, and University of Witwatersrand, RCNP, University of Osaka, Department of Physics, Florida State University, Tallahassee, Fl 32306, USA, IRFU, CEA, Université Paris-Saclay, Michigan State University and University of Tennessee, University of Indiana, University of Tennessee at Knoxville, Tennessee Tech University, Seattle University, Davidson College, National Superconducting Cyclotron Laboratory (NSCL), Jefferson Labs, Central Piedmont Community College, Jeffersion Lab, Drake University, University College Cork, University of Wisconsin - La Crosse, University of Tokyo, Tohoku University, University of Groningen, Osaka University, Kyoto University, Saint Mary's College, Konan University, The Institut de Physique Nucleaire Orsay, Texas A&M University Cyclotron Institute, Shaanxi Normal University, Houghton College, Bundesamt für Strahlenshutz (Germany), Ohio Wesleyan University, Bundesamt f\"{u}r Strahlenshutz, Goethe University Frankfurt, Ursinus, UW, Davidson, Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA, Fudan University, Oakridge National Laboratory, University of Massachusetts Lowell, NSCL, Michigan State Univ, Advanced Science Research Center, Japan Atomic Energy Agency, NSCL, Michigan State University, Ursinus College, Universidade de S\~{a}o Paulo, NSCL/MSU, Institute of Modern Physics, Swarthmore College, Institut f$\ddot{\rm u}$r Kernphysik, Technische Universit$\ddot{\rm a}$t Darmstadt/GSI/ Max-Plank-Institute f$\ddot{\rm u}$r Kernphysik, Institut f$\ddot{\rm u}$r Kernphysik, Technische Universit$\ddot{\rm a}$t Darmstadt, Physics Division, ORNL, NSCL/Department of Chemistry, MSU, NSCL, MSU, Department of Chemistry, Augustana University, NSCL/Department of Physics and Astronomy, MSU, UTK, Saint Mary’s University, Faculty of Chemistry, Adam Mickiewicz University, Faculty of Physics, University of Warsaw, GSI, Darmstadt, IKP, TU Darmstadt, Physics Division, Argonne National Laboratory, Ohio State University, CNRS/IP2N3 Bordeaux, France, University of Illinois at Chicago, Caltech, University of Dallas, Jefferson Laboratory, University of Florida, CEA/DAM, France, IAEA, ITA, Academy of Sciences of the Czech Republic, The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ PAN), Indiana University South Bend, Cyclotron Institute / Texas A\&M University, North Carolina State University, TUNL, European X-ray Free Electron Laser GmbH, U. of Victoria, LBNL, Berkeley, CA, SLAC, Menlo Park, CA, Jefferson Lab, Newport News, VA 23606, University of Kentucky Depts. of Chemistry and Physics \& Astronomy
R. J. DeBoer

University of Notre Dame
Katherine Jones

University of Tennessee, University of Tennessee Knoxville, University of Tennessee, Knoxville
K. T. Macon

University of Notre Dame