Development of a Cryogenic Helium Gas Target for Direct Reaction Studies

ORAL

Abstract

Helium-3-induced reactions can be used as tools to study properties of nuclei by selectively populating states via (3He,d), (3He,p), (3He,a), (3He,n), etc. At Louisiana State University, a gas target has been developed with a cryogenic cooling system to enable studies of 3He-induced reactions. The target windows are 7.5 um-thick Kapton with a 0.5-inch diameter aperture. The linear thickness may be varied by changing the window flanges. An areal density of 134 ug/cm2 can be achieved with a 5-mm thick target filled with 500 Torr of 3He at 90 K. One example of a 3He-induced reaction is 7Be(3He,p)9B that can be used to populate states of 9B. The first-excited state of 9B has been studied and modeled for decades with little agreement on the energy and width of the state. Test experiments using the gas target as a 3He target have been conducted with 7Li and 7Be beams at Texas A&M University. The gas target performance and preliminary results from these (3He,p) reactions will be presented.

*Work supported by the Department of Energy, Office of Science under grant no. DE-SC0014231 and the National Nuclear Security Administration under grant number DE-NA000384.

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Presenters

  • Zachary M Purcell

    • Louisiana State University

Authors

  • Zachary M Purcell

    • Louisiana State University

  • Rachel M Shaffer

    • Louisiana State University

  • Keilah S Davis

    • Louisiana State University

  • William D Braverman

    • Louisiana State University
    • LSU

  • Graeme Morgan

    • Louisiana State University

  • Scott T Marley

    • Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

  • Catherine M Deibel

    • Louisiana State University

  • Anthony Thomas

    • Washington University, St. Louis
    • Washington University in St. Louis

  • Nicolas Dronchi

    • Washington University, St. Louis

  • Jon Elson

    • Washington University, St. Louis
    • Washington University in St. Louis

  • Lee G Sobotka

    • Washington University, St. Louis

  • Antti Saastamoinen

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

  • Grigory V Rogachev

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

  • Cody E Parker

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

  • Morgan Nasser

    • Cyclotron Institute, Texas A&M University

  • David McClain

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

  • Michael J Roosa

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

  • Dustin P Scriven

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

  • Emily Harris

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