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.

*This work is supported by the DOE-NP (DE-FG02-93ER40773) and by the NNSA through CENTAUR (DE-NA0003841 and DE-NA0004150).

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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