Dose rate effects on the performance of MWCVD diamond films as TL gamma radiation dosimeter

Cruz-Zaragoza, E.; Gastélum, S.; Meléndrez, R.; Chernov, V.; Barboza-Flores, M.

doi:10.1002/pssa.200925361

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…The high temperature peak exhibits its maximum at 307 °C when irradiated with 3 Gy and is shifted to lower temperatures when the dose is increased. TL glow curves of similar shapes and intensities have been observed in different CVD diamond samples …”

Section: Resultssupporting

confidence: 66%

See 1 more Smart Citation

X‐Ray Thermoluminescence Dosimetry Characterization of Commercially Available CVD Diamond

Gil-Tolano¹,

Meléndrez²,

Álvarez-García³

et al. 2018

Physica Status Solidi (a)

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High quality commercially available CVD diamonds are being tested in novel clinical high energy photons, hadron therapy, and high energy physics applications. In the present work, the authors report on the thermoluminescence (TL) and dosimetry properties of commercial synthetic CVD diamond sample from Element6, exposed to X‐ray irradiation at dose rates of 3.9–120 Gy min−1 from 0.13 to 90 Gy. The TL glow curves are composed of four peaks with maxima at about 104, 150, 210, and 280 °C and activation energies of 0.78, 0.79, 0.81, and 1.0 eV, respectively. The dose response of the area under TL glow curves is linear at doses lower than 0.6 Gy, supralinear between 0.6 and 6 Gy and sublinear at higher doses. The samples exhibited a strong TL fading of the low temperature 104 °C peaks that fades away around 120 min after irradiation, which is accompanied by increasing of the 210 and 280 °C peaks. The measured TL cycle reproducibility was very good, in spite of the fading exhibited by the lower temperature peak, with values of 0.1–3.0% at different dose rates and doses. It is concluded that CVD commercially single crystal electronic grade diamond may be securely used in clinical radiotherapy.

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Section: Resultssupporting

confidence: 66%

“…TL glow curves of similar shapes and intensities have been observed in different CVD diamond samples. [23][24][25] Figure 1. TL glow curves of CVD diamond crystal recorded after X-ray irradiation at the dose rate of 90 Gy min À1 with the indicated doses.…”

Section: Thermoluminescencementioning

confidence: 99%

X‐Ray Thermoluminescence Dosimetry Characterization of Commercially Available CVD Diamond

Gil-Tolano¹,

Meléndrez²,

Álvarez-García³

et al. 2018

Physica Status Solidi (a)

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“…The TL glow curves features are similar to those presented in refs. and are typically found in nanodiamonds.…”

Section: Resultsmentioning

confidence: 99%

“…All the TL glow curves reveal a main high temperature peak with maximum between about 320 and 380 C. Additionally, the ND-60 powders have a weak low temperature peak at about 100 C while the ND-660 powders exhibit unstructured TL between 50 and 250 C. The TL glow curves features are similar to those presented in refs. [10][11][12][24][25][26] and are typically found in nanodiamonds.…”

Section: Thermoluminescencementioning

confidence: 99%

Raman and Thermoluminescence Studies of HPHT Synthetic Nanodiamond Powders

Ruiz-Valdez

Chernov

Meléndrez

et al. 2018

Physica Status Solidi (a)

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Nanocrystalline diamond has received increasing attention because of its unique perspectives in biomedical applications. In this work, Raman and thermoluminescence (TL) properties of commercial synthetic high pressure–high temperature (HPHT) nanodiamond powders with mean size of 60, 140, 380, and 660 nm purchased from PlasmaChem GmbH, Germany are presented. The Raman spectra exhibit a diamond peak related to the CC sp3 chemical bond and a number of additional bands that could be assigned to G‐band, OH and CO groups and some intrinsic point defects. The position of the diamond peak does not depend on nanoparticle size when it is monitored with low power laser. The use of a laser with increased power leads to uncontrolled heating of the nanopowders that is manifested as a broadening and down‐shifting of the 1332 cm−1 line. After exposure to beta radiation, all the powders exhibit a main broad TL peak with maxima between 320 and 380 °C and a weaker low temperature TL. The dose response is linear at the doses of less than 10 Gy for all the powders. At higher doses a supralinear behavior is observed.

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“…For use in radiation dosimetry, diamond has been in demand mostly in the form a film of suitable thickness. For such applications, films of diamond have been prepared mainly by chemical vapour deposition (CVD) methods [2][3][4][5][6][7][8]. The CVD based techniques can deposit films of desired thickness and properties.…”

Section: Introductionmentioning

confidence: 99%

TL and OSL studies on undoped diamond films grown by hot filament chemical vapor deposition

Soni

Choudhary

Polymeris

et al. 2016

Journal of Luminescence

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Dose rate effects on the performance of MWCVD diamond films as TL gamma radiation dosimeter

Cited by 4 publications

References 20 publications

X‐Ray Thermoluminescence Dosimetry Characterization of Commercially Available CVD Diamond

X‐Ray Thermoluminescence Dosimetry Characterization of Commercially Available CVD Diamond

Raman and Thermoluminescence Studies of HPHT Synthetic Nanodiamond Powders

TL and OSL studies on undoped diamond films grown by hot filament chemical vapor deposition

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