$^{238}$U Fission Ion Chamber for Neutron Dosimetry at the 88-Inch Cyclotron

POSTER

Abstract

Efficiency measurements have been conducted for a commercial $^{238}$U fission ion chamber, to be used for neutron dosimetry at the 88-Inch Cyclotron at LBNL. Fast, quasi-monoenergetic neutrons in the energy range of 5 to 30 MeV are under development at the facility through deuteron break-up, for radiation effects testing and cross-section measurements for a variety of applications. Through comparisons with absolute fluxes obtained using activation foils, and energy spectra obtained using the time-of-flight method, efficiency for both monoenergetic and white spectrum neutrons can be calculated.

*Supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and the U.S. DOE National Nuclear Security Administration under Award \#DE-FG03-03NA0078 through the University of California, Berkeley, Department of Chemistry.

Authors

  • Brent Wilson

    • Lawrence Berkeley National Laboratory

  • Peggy McMahan

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab

  • Brad Barquest

    • Lawrence Berkeley National Laboratory
    • University of California, Berkeley

  • Mike Johnson

    • Lawrence Berkeley National Laboratory