Electron spin resonance measurement of radiation-induced defects and reactions in vitreous silica irradiated with ion beams

Autor:	Hirotake Moriyama, Masafumi Akiyoshi, Jun Takemoto, Kirnikazu Moritani, Ikuji Takagi
Rok vydání:	2008
Předmět:	Nuclear and High Energy Physics Ion beam Chemistry Radical Analytical chemistry Activation energy Fluence law.invention Ion Nuclear magnetic resonance Nuclear Energy and Engineering law General Materials Science Irradiation Electron paramagnetic resonance Spin (physics)
Zdroj:	Journal of Nuclear Materials. 374:293-297
ISSN:	0022-3115
DOI:	10.1016/j.jnucmat.2007.08.011
Popis:	The electron spin resonance (ESR) measurement of irradiation defects and reactions in ion beam irradiated vitreous silica was performed. The spin densities of E′ centers, non-bridging oxygen hole centers (NBOHCs), and peroxy radicals (PORs) were measured as a function of the ion beam fluence and postirradiation isothermal annealing temperature. The spin densities of these centers were observed to saturate above the dpa value of 10−2. In isothermal annealing experiments, sequential reactions of the E′ centers with oxygen atoms to form the NBOHCs and PORs were observed to occur, and the rate constants of those reactions were determined. The activation energies were obtained to be about 0.4 eV for those reactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a03660210af487f7ec1c8e2eefa1025 https://doi.org/10.1016/j.jnucmat.2007.08.011 Zobrazit plný text záznamu Full Text from ScienceDirect