Beam contaminants reduction for experiments with St. George

ORAL

Abstract

The St. George recoil mass separator at the University of Notre Dame was designed to study radiative capture reactions relevant for stellar burning. St. George is coupled to the 5U accelerator at the Nuclear Science Laboratory.  A benchmark reaction, 20Ne(α, γ) 24Mg, was studied in November 2019. While showing results consistent with literature, 5U accelerator beam contaminants, which have indistinguishable mass and momentum from recoils, have limited the ability to extend the measurements to lower energies. A Wien filter was installed on the 5U transport line earlier this year with the goal of rejecting the beam contaminants before they enter St. George. The significant background reduction measured in a recent experimental test will be presented.

*This research is supported by the National Science Foundation (NSF) under Grants No. PHY-2011890 and PHY-1430152 (JINA Center for the Evolution of the Elements).

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Presenters

  • Ruoyu Fang

    • University of Notre Dame

Authors

  • Ruoyu Fang

    • University of Notre Dame

  • Georg P Berg

    • University of Notre Dame

  • Manoel Couder

    • University of Notre Dame

  • Alexander C Dombos

    • University of Notre Dame
    • FRIB

  • Joseph Henning

    • University of Notre Dame

  • Jerry D Hinnefeld

    • Indiana University South Bend

  • Patricia L Huestis

    • University of Notre Dame

  • Luis A Morales

    • University of Notre Dame

  • Shane Moylan

    • University of Notre Dame

  • Fabio Rivero

    • University of Notre Dame

  • Daniel Robertson

    • University of Notre Dame

  • Christopher J Seymour

    • University of Notre Dame

  • Gwenaelle Seymour

    • Rutgers University

  • Michael A Skulski

    • University of Notre Dame

  • Edward J Stech

    • University of Notre Dame

  • Michael C F Wiescher

    • University of Notre Dame
    • The Joint Institute for Nuclear Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA