Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8174017 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2015 | 7 Pages |
Abstract
Transparent plastic scintillators based on polyvinyltoluene (PVT) have been fabricated with high loading of bismuth carboxylates for gamma spectroscopy, and with lithium carboxylates for neutron detection. When activated with a combination of standard fluors, 2,5-diphenyloxazole (PPO) and tetraphenylbutadiene (TPB), gamma light yields with 15Â wt% bismuth tripivalate of 5000Â Ph/MeV are measured. A PVT plastic formulation including 30Â wt% lithium pivalate and 30Â wt% PPO offers both pulse shape discrimination, and a neutron capture peak at ~400Â keVee. In another configuration, a bismuth-loaded PVT plastic is coated with ZnS(6Li) paint, permitting simultaneous gamma and neutron detection via pulse shape discrimination with a figure-of-merit of 3.8, while offering gamma spectroscopy with energy resolution of R(662Â keV)=15%.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Nerine J. Cherepy, Robert D. Sanner, Patrick R. Beck, Erik L. Swanberg, Thomas M. Tillotson, Stephen A. Payne, Charles R. Hurlbut,