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

Chiu, Po-Kai; Chiang, Donyau; Lee, Chao-Te; Lin, Yu-Wei; Hsiao, Chien-Nan

doi:10.1116/1.4921525

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

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Abstract

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:

Chiu, Po-Kai; Chiang, Donyau; Lee, Chao-Te; Lin, Yu-Wei; Hsiao, Chien-Nan ^[1]

Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 300, Taiwan (China)

Publication Date:: Tue Sep 15 00:00:00 EDT 2015

OSTI Identifier:: 22392207

Resource Type:: Journal Article

Journal Name:: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films

Additional Journal Information:: Journal Volume: 33; Journal Issue: 5; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0734-2101

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

Citation Formats


                    Chiu, Po-Kai, Chiang, Donyau, Lee, Chao-Te, Lin, Yu-Wei, and Hsiao, Chien-Nan. Optical properties and crystallinity of silver mirrors under a 35 krad cobalt-60 radiation.  United States: N. p., 2015. 
        Web.  doi:10.1116/1.4921525.

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                    Chiu, Po-Kai, Chiang, Donyau, Lee, Chao-Te, Lin, Yu-Wei, & Hsiao, Chien-Nan. Optical properties and crystallinity of silver mirrors under a 35 krad cobalt-60 radiation.  United States.  https://doi.org/10.1116/1.4921525

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                    Chiu, Po-Kai, Chiang, Donyau, Lee, Chao-Te, Lin, Yu-Wei, and Hsiao, Chien-Nan. 2015.  
        "Optical properties and crystallinity of silver mirrors under a 35 krad cobalt-60 radiation".  United States.  https://doi.org/10.1116/1.4921525.

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@article{osti_22392207,

  title        = {Optical properties and crystallinity of silver mirrors under a 35 krad cobalt-60 radiation},

  author       = {Chiu, Po-Kai and Chiang, Donyau and Lee, Chao-Te and Lin, Yu-Wei and Hsiao, Chien-Nan},

  abstractNote = {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.},

  doi          = {10.1116/1.4921525},

  url          = {https://www.osti.gov/biblio/22392207},
  journal      = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},

  issn         = {0734-2101},

  number       = 5,

  volume       = 33,

  place        = {United States},

  year         = {Tue Sep 15 00:00:00 EDT 2015},

  month        = {Tue Sep 15 00:00:00 EDT 2015}

}

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