title: Thermoluminescent properties of Ni and Co doped synthetic, high pressure, high temperature diamonds: application to ionising radiation dosimetry.
abstract: An investigation of the thermoluminescence (TL) properties of high pressure, high temperature (HPHT) synthetic diamond crystals grown under diluted nickel or cobalt as solvent catalysts is reported. After a study of TL properties of 6 different samples, it is shown that a crystal grown with Ni+2%Ti and annealed at 2100 K presents an intense glow peak at around 490 K. This peak is characterised by a broad emission band centred at 530 nm (2.34 eV). This crystal presents a significant, reproducible and linear TL response relative to the absorbed dose up to an X ray air kerma of 10 Gy. All these features make this material suitable for ionising radiation dosimetry. A similar study is made on another crystal grown from pure Co, and a comparative review of the results does show that for dosimetry work, Ni-containing diamonds are more appropriate than those grown from Co catalyst.
authors.affiliation: LPES-CRESA, EA 1174, Université de Nice-Sophia Antipolis, Parc Valrose, Nice, France. ben@unice.fr
authors.forename: M
authors.initials: M
authors.lastname: Benabdesselam
authors.forename: P
authors.initials: P
authors.lastname: Iacconi
authors.forename: E
authors.initials: E
authors.lastname: Gheeraert
authors.forename: H
authors.initials: H
authors.lastname: Kanda
authors.forename: D
authors.initials: D
authors.lastname: Lapraz
authors.forename: D
authors.initials: D
authors.lastname: Briand
mesh_terms: D003035:Cobalt / Q000737:chemistry; D003460:Crystallization; D018130:Diamond / Q000737:chemistry / Q000528:radiation effects*; D006358:Hot Temperature; D008163:Luminescent Measurements; D009532:Nickel / Q000737:chemistry; D011312:Pressure; D011854:Radiochemistry; D013053:Spectrophotometry; D013819:Thermoluminescent Dosimetry / Q000379:methods*; D014965:X-Rays
chemical_list: D003035:Cobalt; D018130:Diamond; D009532:Nickel