Origin of the Radiation-Induced OH Vibration Band in Polymer-Coated Optical Fibers Irradiated in a Nuclear Fission Reactor
نویسنده
چکیده
We measured in situ the radiation-induced absorption of pure silica core fibers exposed to a fission nuclear radiation. We observed the growth of the 1.38m OH vibration band in polymer coated fiber. Two contributions, a gamma-induced hydrogen diffusion and the recoil protons, are compared. The major contribution to the OH content growth is identified to originate from the gamma-induced hydrogen diffusion. The identification of the parameters governing the mechanism has important implications on the design of a fast-neutron fiber optic monitor.
منابع مشابه
Radiation Effect in Silica Optical Fiber Exposed to Intense Mixed Neutron–Gamma Radiation Field
We measured in situ the radiation-induced absorption of pure silica core fibers exposed to a fission nuclear reactor. We observed the growth of the 1.39m OH vibration band in polymer coated fiber. Three mechanisms are responsible for this effect: recoil protons, hydrogen diffusion, and a probable compaction effect. Based on this experiment, a fiber-optic neutron monitor prototype is proposed.
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