Thermoluminescence characterization of a MWCVD diamond film exposed to β-rays and UV radiation

S. Preciado-FIores, M. Schreck, R. Meléndrez, V. Chernov, R. Bernal, C. Cruz-Vázquez, F. Brown, M. Barboza-Flores*

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

8 Citas (Scopus)

Resumen

The thermoluminescence (TL) characterization of a 10 μm thick microwave plasma chemical vapor deposited (MWCVD) diamond film grown on a (001) silicon substrate and exposed to β-rays and ultraviolet (UV) light was performed. Several TL glow peaks between 300 and 580 K as well as a highest intensity first order TL peak located at 610 K are present in the beta radiation exposed samples. UV irradiated samples exhibit mainly the 610 K TL glow peak that is fully the same to beta irradiated samples. The TL creation spectrum of UV exposed samples spans the 200-400 nm range with maximum TL efficiency around 200-230 nm and 300-380 nm. Thus, it covers the whole UV electromagnetic spectrum relevant to human health concern which is related to UV sunlight radiation reaching the Earth s surface. The TL dosimetry response is linear for beta radiation doses below 0.5 kGy. It increases sub-linearly for higher doses. The UV exposed samples showed a linear-sub-linear dose behavior and a high sensitivity to UV radiation for beam irradiance of the order of 10 -3 W/m 2. A pronounced fading of all the TL peaks was also observed.

Idioma originalInglés
Páginas (desde-hasta)2206-2211
Número de páginas6
PublicaciónPhysica Status Solidi (A) Applications and Materials Science
Volumen202
N.º11
DOI
EstadoPublicada - sep. 2005

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