Инд. авторы:	Yelisseyev A., Vins V., Afanasiev V., Rybak A.
Заглавие:	Effect of electron irradiation on optical absorption of impact diamonds from the Popigai meteorite crater
Библ. ссылка:	Yelisseyev A., Vins V., Afanasiev V., Rybak A. Effect of electron irradiation on optical absorption of impact diamonds from the Popigai meteorite crater // Diamond and Related Materials. - 2017. - Vol.79. - P.7-13. - ISSN 0925-9635. - EISSN 1879-0062.
Внешние системы:	DOI: 10.1016/j.diamond.2017.08.012; РИНЦ: 31067969; SCOPUS: 2-s2.0-85027981881; WoS: 000414111900002;
Реферат:	eng: The translucent impact diamonds which consist of nanosized grains of cubic diamond (D) or are a mixture of cubic and hexagonal (D + L) diamond were separated using Raman spectroscopy; high pressure high temperature (HPHT) synthetic diamonds and diamond CVD film were taken for comparison. Transmission spectra before and after electron irradiation with 3.0 MeV energy at 1018 cm− 2 dose were recorded. Concentrations of neutral and negatively-charged vacancies (V0, V−) were estimated from absorption in the GR1 and ND1 zero-phonon lines. In case of impact diamonds vacancy concentrations were estimated from the absorption in a broad band of phonon replicas; the relations binding broadband absorption and vacancy concentration were suggested. We established that only neutral vacancies form in impact diamonds at irradiation and their concentration is comparable with the total V0 + V− concentration in HPHT diamonds and diamond CVD film. © 2017 Elsevier B.V.
Ключевые слова:	Radiation induced effects; Nanostructures; Impact diamonds; Optical properties; Superhard materials;
Издано:	2017
Физ. характеристика:	с.7-13