skip to main content

SciTech ConnectSciTech Connect

Title: Optical properties and crystallinity of silver mirrors under a 35 krad cobalt-60 radiation

This study addresses the effects of thin film optical design and environmental radiation on the optical properties of silver mirrors. Different experimental thin film optical designs are selected, and the film stack is built using Macleod's approach. Mirror elements are exposed to the same dose of radiation and their properties are characterized using a spectrophotometer equipped with an integration sphere and an x-ray diffractometer. Spectrophotometric analyses of mirrors exposed to about 35 krad of {sup 60}Co radiations overall show that the B270 glass substrates coated with titanium oxide (TiO{sub 2}), silicon dioxide (SiO{sub 2}), pure chrome, and pure silver effectively reduces radiation damage. The absorption spectrum of the TiO{sub 2} film in the visible region decreases after radiation and displays drifting. As thin metal films comparison, the silver thin film exhibits higher radiation resistance than the chrome thin film. The x-ray diffraction analysis on metal film layers reveals that crystallinity slightly increases when the silver thin film is irradiated.
Authors:
; ; ; ;  [1]
  1. Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 300, Taiwan (China)
Publication Date:
OSTI Identifier:
22392207
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films; Journal Volume: 33; Journal Issue: 5; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COBALT 60; DESIGN; IRRADIATION; MIRRORS; OPTICAL PROPERTIES; RADIATION DOSES; RADIATION EFFECTS; SILICA; SILICON OXIDES; SILVER; SPECTROPHOTOMETERS; THIN FILMS; TITANIUM OXIDES; X-RAY DIFFRACTION; X-RAY DIFFRACTOMETERS