TL;DRAbstract
The transient radiation-induced absorption in fused silica due to neutron and γ-ray irradiation has been investigated. Transient absorption coefficients at 325 nm have been measured during and after pulsed reactor (TRIGA) irradiation. Radiation-induced absorption results from the generation of color centers. Most of the previous efforts have been concerned with the permanent effects due to low dose rate steady-state irradiations. This study focuses on the transient effects due to pulsed irradiations and their dependence on dose rate and total dose. The transient absorption coefficient increases very rapidly to a maximum value during the pulse, then decreases over a time period >1000 seconds to a permanent value after the pulse. In general, the absorption coefficient is found to increase with increasing dose rate and total dose.
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The transient radiation-induced absorption in fused silica due to neutron and γ-ray irradiation has been investigated. Transient absorption coefficients at 325 nm have been measured during and after pulsed reactor (TRIGA) irradiation. Radiation-induced absorption results from the generation of color centers. Most of the previous efforts have been concerned with the permanent effects due to low dose rate steady-state irradiations. This study focuses on the transient effects due to pulsed irradiations and their dependence on dose rate and total dose. The transient absorption coefficient increases very rapidly to a maximum value during the pulse, then decreases over a time period >1000 seconds to a permanent value after the pulse. In general, the absorption coefficient is found to increase with increasing dose rate and total dose.
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