Optically stimulated luminescence dosimetry on CVD diamond films

Barboza-Flores, M.; Meléndrez, R.; Gonçalves, J.A.N.; Sandonato, G. M.; Chernov, V.; Cruz-Zaragoza, E.; Ochoa-Nuño, J. D.; Bernal, R.; Crúz-Vázquez, C.; Brown, Francisco

doi:10.1002/pssa.200405167

Cited by 10 publications

(4 citation statements)

References 2 publications

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“…AG is caused by slow radiative recombination (phosphorescence) of electrons thermally released from filled shallow traps into the conduction band 4, 5. Stimulation with infrared or visible light of CVD diamond that has previously been exposed to ionizing or UV radiation creates intense luminescence referred as OSL 6–10. OSL is caused by interaction of the stimulating light with electrons trapped in optically active traps.…”

Section: Introductionmentioning

confidence: 99%

Correlation between thermally and optically stimulated luminescence in beta‐irradiated undoped CVD diamond

Chernov

Piters

Meléndrez

et al. 2009

Physica Status Solidi (a)

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The behaviour of afterglow (AG), thermoluminescence (TL) and infrared-stimulated luminescence (IRSL) in beta-irradiated chemical vapour deposition diamond is presented. The TL glow curve consists of four peaks with maxima at about 380, 430, 530 and 610 K. The AG decay is fitted by Becquerel's law with exponent close to 1, and correlates well with the thermal emptying of the traps responsible for the 380 K peak. Stimulation with IR light (830 nm) creates intense IRSL and destroys the 380, 430 and 530 K peaks. Illumination with shorter wavelength light also destroys the 610 K peak. The thermal cleaning procedure removes subsequently TL peaks, AG and IRSL. The AG signal decays together with the disappearance of the 380 K peak. The IRSL signal decays continuously with the removal of the 380, 430 and 530 K peaks. Traps responsible for the 610 K peak do not participate in the IRSL process.

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Section: Introductionmentioning

confidence: 99%

Correlation between thermally and optically stimulated luminescence in beta‐irradiated undoped CVD diamond

Chernov

Piters

Meléndrez

et al. 2009

Physica Status Solidi (a)

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“…Furthermore, recent investigations have shown that CVD diamond may be used as optically stimulated luminescence (OSL) detectors and dosimeters [19,20]. Furthermore, recent investigations have shown that CVD diamond may be used as optically stimulated luminescence (OSL) detectors and dosimeters [19,20].…”

Section: B)mentioning

confidence: 99%

CVD Diamond Applications as TL Radiation Dosimeters

et al. 2007

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The extraordinary characteristics of chemically vapor deposited (CVD) diamond such as tissue equivalence, radiation hardness, and lack of solubility in water; makes CVD diamond a very promising material for radiation dosimetry applications. Recent investigations have shown that CVD techniques allowed the growing of good quality diamond films in a diversity of substrates to be used in the form of ionization chambers, thermoluminescence (TL) detectors and dosimeters. In the present work, we report on the TL properties of MWCVD diamond exposed to gamma radiation in the 0.05 -10.0 kGy dose range and 43.5 and 81.11 Gy min −1 dose rates. The CVD diamond displays a linear dose behavior and 5% TL cycle reproducibility, without requiring any annealing or thermal treatment before using it as TL dosimeter. In spite of the significant results, some problems remain and a lot of research work is necessary to improve the synthetic material characteristics to optimize the TL radiation dosimeter properties.

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“…Diamond films made using the chemical vapor deposition process, with various impurities to enhance radiation response, have been studied and shown to be effective dosimeter materials for radiation doses from 0.8 Gy to 3 kGy using OSL analysis (Barboza-Flores et al, 2004). Natural diamond has its own impurities (responsible for color and other qualities), and the radiation sensitivity for a particular gemstone would be determined a posteriori as part of the dosimetric analysis, as noted above.…”

Section: Optical Stimulation Of Fortuitous Dosimetersmentioning

confidence: 99%