Thermoluminescence properties of CVD diamond films

0185840 - UJF-V 20033169 RIV DE eng J - Journal Article
Pospíšil, J. - Bulir, R. - Budínská, Z. - Novák, R. - Sopko, B. - Spěváček, V. - Čechák, T. - Hlídek, P. - Matějka, P. - Macková, Anna - Cejnarová, A. - Krása, Josef
Thermoluminescence properties of CVD diamond films.
Physica Status Solidi A. Roč. 199, č. 1 (2003), s. 131-137. ISSN 0031-8965
R&D Projects: GA AV ČR KSK1010104
Keywords : radiation detectors * solid targets * laser
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.950, year: 2003

Two kinds of CVD diamond films were investigated with respect to their thermoluminescent (TL) properties, especially concerning their sensitivity to ionising radiation and to daylight. The films were characterised by means of Raman/photoluminescence/FTIR spectroscopy, XRD, RBS and elastic recoil detection analysis (ERDA). Thermoluminescent (TL) responses of these materials to photons provided by radionuclide Fe-55 source (approximate to6 keV) over the dose range from 1 to 100 mGy were measured. Typical TL glow curve is a result of two components, one with maximum in range 160-180 degreesC and the second, between 307-327 degreesC. In irradiated samples, the first peak is caused by the exposure to daylight, which increases overall TL signal, the second is caused by irradiation by gamma-photons. Exploitation of TL properties of CVD diamonds for a photon dosimetry is possible after careful daylight shielding. The sensitivity of used CVD diamond dosimeters was 10 times less than that of TLD 100 (LiF: Mg, Ti) Harshaw dosimeter.
Permanent Link: http://hdl.handle.net/11104/0082196