Development and first results of DAPPER

ORAL

Abstract

The Detector Array for Photons, Protons, and Exotic Residues has been designed, developed, commissioned, and used for measurement at Texas A&M University. It allows measurement of direct reactions in inverse kinematics, affording use of rare isotope beams. The array consists of a third of a ton of highly segmented BaF2 scintillator (TAMU/ORNL) to measure individual gamma ray energies as well as the total gamma ray energy with high efficiency. Charged ejectiles are measured in silicon to determine the excitation energy of the heavy residue independently of the gamma ray energy. For low-rate (radioactive beam) experiments, a fast segmented axial-field ionization chamber (GODDESS IC) can be coupled to measure atomic number of reaction products around zero degrees. Reactions of 57Fe(d,pg) @ 7.5 MeV/u in inverse kinematics were studied in the DAPPER first experiment to extract the photon strength function of 58Fe. Reactions of 54Fe(d,pg) @ 7.5 MeV/u in inverse kinematics have recently been measured in DAPPER. In this talk, the performance of the array will be highlighted, results will be summarized, and future prospects will be mentioned.

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Presenters

  • Alan B McIntosh

    Cyclotron Institution, Texas A&M, Texas A&M University, Cyclotron Institute, Texas A&M University, College Station, Texas, USA, Cyclotron Institution, Texas A&M University Cyclotron Institute

Authors

  • Alan B McIntosh

    Cyclotron Institution, Texas A&M, Texas A&M University, Cyclotron Institute, Texas A&M University, College Station, Texas, USA, Cyclotron Institution, Texas A&M University Cyclotron Institute

  • Austin Abbott

    Texas A&M University–Kingsville, Texas A&M University Cyclotron Institute

  • Arthur Alvarez

    Texas A&M University Cyclotron Institute

  • Sudarsan Balakrishnan

    Rutgers University, Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ, USA

  • Aaron J Couture

    Los Alamos National Laboratory, Los Alamos National Laboratory (LANL)

  • Steven D Pain

    Oak Ridge National Laboratory, Oak Ridge, TN, USA / Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, USA, Oak Ridge National Laboratory, University of Tennessee, Oak Ridge National Laboratory / University of Tennessee-Knoxville

  • Rajesh Ghimire

    Lawrence Livermore National Laboratory

  • Mara Grinder

    Oak Ridge National Laboratory, Rutgers University

  • Jerome Gauthier

    Texas A&M University, Texas A&M University Cyclotron Institute

  • Kris Hagel

    Cyclotron Institute, Texas A&M University Cyclotron Institute

  • Thomas T King

    Oak Ridge National Laboratory

  • Shea Mosby

    Los Alamos Natl Lab, Los Alamos National Laboratory

  • Shuya Ota

    Brookhaven National Laboratory (BNL), Brookhaven National Laboratory

  • Gregory Potel

    Lawrence Livermore National Laboratory

  • Christopher J Prokop

    Los Alamos National Laboratory

  • Andrew Ratkiewicz

    Lawrence Livermore National Laboratory, Livermore, CA, USA, Lawrence Livermore National Laboratory

  • Sebastian Regener

    Texas A&M University Cyclotron Institute

  • Andrea L Richard

    Ohio University

  • Maxwell Q Sorensen

    Texas A&M University, Texas A&M University Cyclotron Institute

  • Robert Lindsay Varner

    Oak Ridge National Laboratory

  • Sherry J Yennello

    Texas A&M, Texas A&M University College Station, Texas A&M University Cyclotron Institute