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Thermal annealing effects on the TL response of beta‐irradiated HPHT Ib type synthetic diamond
Author(s) -
PreciadoFlores S.,
Meléndrez R.,
Chernov V.,
SotoPuebla D.,
PedrozaMontero M.,
BarbozaFlores M.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200776318
Subject(s) - diamond , annealing (glass) , irradiation , materials science , impurity , analytical chemistry (journal) , atmospheric temperature range , vacancy defect , thermal treatment , reproducibility , synthetic diamond , chemistry , crystallography , metallurgy , composite material , thermodynamics , nuclear physics , physics , organic chemistry , chromatography
It is known that room temperature beta‐irradiated Ib type diamond generates a non‐reproducible TL glow curve shape, due to mobility of the impurity‐vacancy ( I – V ) and interstitials (I) defects in the 30–800 °C temperature range. This situation may hinder the use of this type of diamond material in dose assessment applications. The recurring heating of the Ib type diamond sample changes the defects concentration and consequently the intensity of the TL glow peaks associated to the characteristic temperature annealing stages. In the present work we have performed thermal annealing (TA) treatment on an Ib type diamond in the 100–800 °C range previous to beta irradiation. It was observed that after the 800 °C annealing treatment the TL glow curve showed 3–5% reproducibility, in contrast to the non‐reproducible TL observed in non‐annealed diamond, and remained the same after two months of successive TL read outs. Moreover, the 800 °C annealing treatment assured a linear integrated TL dose behavior, a significant improvement over non‐annealed samples that could facilitate the employment of Ib type synthetic diamond in dosimetric applications. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)