Performance of the LaBr<inf>3</inf>(Ce) scintillator for nuclear resonance fluorescence experiment

Abstract

Performance of the LaBr 3 (Ce) scintillator for nuclear resonance fluorescence (NRF) experiment was investigated. Linearity and energy resolutions of the LaBr 3 (Ce) scintillator of 3 inch in diameter × 3 inch in thickness were measured using NRF scattering gamma ray from 208 Pb (5.5 MeV and 7.3 MeV) and 24 Mg (10.7 MeV). The linearity of the output for the gamma ray energy was less than 1 % and the energy resolution of the scintillator in keV was almost proportional to the square root of the gamma ray energy up to 10.7 MeV.

Nuclear Resonance Fluorescence of 235U Measured with High-Resolution LaBr3(Ce) Scintillation Detectors

“…Therefore, NRF provides a powerful probe for a nondestructive assay (NDA) of materials even under a heavy-shielding condition, which has an important impact on homeland security technologies. [1][2][3][4][5] Gamma ray sources and detection systems are key issues for a NDA by a NRF technique. Because of the narrow bandwidth of the NRF level (on the order of eV or less), only a very small fraction of incident -rays contribute to the NRF reaction.…”