1. Neutron resonance fission neutron analysis for nondestructive fissile material assay.
- Author
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Hironaka, K., Lee, J., Koizumi, M., Ito, F., Hori, J., Terada, K., and Sano, T.
- Subjects
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NEUTRON resonance , *FORM perception , *NEUTRON counters , *SCINTILLATION counters , *NUCLEAR nonproliferation , *NUCLIDES , *URANIUM , *NEUTRONS - Abstract
We propose neutron resonance fission neutron analysis (NRFNA), an active nondestructive assay (NDA) technique, to improve the capability to identify and quantify a small amount of fissile material in a sample. NRFNA uses pulsed neutrons to induce fission reactions in the sample. Fission neutrons are detected by a neutron-gamma pulse shape discrimination (PSD) scintillation detector with time-of-flight (TOF) technique. The obtained nuclide-specific resonance peaks in the neutron energy spectrum provide information to identify and quantify a fissile material in the sample. The possibility of using PSD for NRFNA was confirmed through a test experiment using a natural uranium sample. We successfully observed the resonance peaks from 235 U(n,f) reaction and showed that NRFNA would be useful for measuring a small amount of fissile material in a sample. • Neutron resonance analysis method to identify and quantify a fissile material. • Fission neutron detection with a neutron-gamma pulse shape discrimination technique. • Resonance peaks of fission reaction by 235U in natural uranium was observed. • Applicable to nuclear nonproliferation, safeguard etc. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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