Thermoluminescence of CVD diamond films used in photon dosimetry

0185374 - UJF-V 20010101 RIV DE eng J - Journal Article
Pospíšil, J. - Novák, R. - Sopko, B. - Spěváček, V. - Hlídek, P. - Matějka, P. - Macková, Anna - Cejnarová, Andrea - Juha, Libor - Krása, Josef
Thermoluminescence of CVD diamond films used in photon dosimetry.
Physica Status Solidi A. Roč. 185, č. 1 (2001), s. 195-202. ISSN 0031-8965
R&D Projects: GA AV ČR KSK1010104
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 1.025, year: 2001

The diamond films, properties of which art: presented in this contribution, were grown on a silicon substrate using the microwave plasma-enhanced chemical vapour deposition (MPECVD) technique. The films were characterised by means of Raman/photoluminescence/FTIR spectroscopy, XRD, RES and elastic recoil detection analysis (ERDA). Thermoluminescent (TL) responses of this material to photons provided by radionuclide Co-60 source (1.173/1.332 MeV) over a dose range from 1 to 50 Gy were measured. During the initial, i.e.first irradiation cycle, the dependencies of TL signals onthe gamma-ray doses seem to be quite linear up to 20 Gy. However, dramatic changes in the evolution of the TL signals occur during further irradiation, i.e. when the irradiation continues with another irradiation cycle. Then the sensitivity of the TL material to high-energy photons increases significantly with the dose. An explanation of this phenomenon lies very likely in the radiation driven formationof TL active defects.
Permanent Link: http://hdl.handle.net/11104/0081773