Abstract
Calculation of Thermal Neutron Induced Electron Fluxes Generated in a Fiber-Optic Cerenkov Radiation Sensor Using Monte Carlo N-Particle Transport Code
Highlights
ISSN 0914-4935 © MYU K.K.Sensors and Materials, Vol 28, No 6 (2016)A charged particle cannot travel with a velocity greater than the phase velocity of light in a vacuum
Most of these electrons are derived from conversion electrons with an energy of 72 keV emitted from the Gd-157 foil and background gamma rays; the conversion electrons can lose their energy to a level below the Cerenkov threshold energy (CTE) by passing through the Gd-157 foil and rutile crystal
We can estimate that almost all Cerenkov radiation generated in the fiber-optic Cerenkov radiation sensor (FOCRS) is induced by the gamma rays generated from the Gd-157
Summary
A charged particle cannot travel with a velocity greater than the phase velocity of light in a vacuum. In some dielectric media, including water, silica, and polymethyl methacrylate (PMMA), a high energy particle can pass through the media with a velocity greater than the phase velocity of light. In contrast to the scintillation generated in a scintillator, Cerenkov radiation generated from a radiator can be used under extremely harsh conditions. In a high temperature tokamak, electron fluxes can be obtained by measuring the Cerenkov radiation generated from some crystals. [7] in radiotherapy dosimetry, it is possible to measure the relative depth of doses for proton beams without ionization quenching by measuring the intensity of Cerenkov radiation.[8] Cerenkov radiation generated in radiators can be a significant signal under conditions of hazardous radiation
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