γ radiation thermoluminescence performance of HFCVD diamond films

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

doi:10.1016/j.nimb.2006.03.006

Cited by 18 publications

(5 citation statements)

References 28 publications

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“…The substrate was chemically removed to have a freestanding diamond sample of 500 µm thickness which was named HF01. The HF01 Raman spectrum has been previously reported 19 and clearly shows the sp 3 diamond 1332 cm −1 component along with the graphitic G (1580 cm −1 ) and D (1350 cm −1 ) bands. The sample shows a blue band emission region on 250–450 nm along with a broad band 500–700 nm associated to N and N–V centers 20.…”

Section: Methodssupporting

confidence: 52%

Heating rate effects on the TL characteristics of hot filament CVD diamond film

Cruz-Zaragoza

Gastélum

Quispe³

et al. 2010

Physica Status Solidi (a)

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The thermoluminescence (TL) glow curve of polycrystalline chemically vapor deposited (CVD) diamond is strongly dependent on the heating rate used. In the present work, we report results about the heating rate effects on a 500 mm hot filament (HF) CVD diamond film grown on silicon substrate using a precursor gas mixture composition of CH 4 (5 sccm)-CO(10 sccm)-H 2 (400 sccm). The irradiations were performed with 60 Co source. The TL measurements were carried out at different heating rates in the 2-30 K/s range. As the heating rate increases, the maximum TL peak intensity decreases and shifts to higher temperature. The shift was from 578 to 669 K for heating rates of 2 and 30 K/s, respectively. The kinetics parameter and its dependence on the heating rate were evaluated using the Chen's peak shape method and a computerized glow curve deconvolution (CGCD) method.

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Section: Methodssupporting

confidence: 52%

Heating rate effects on the TL characteristics of hot filament CVD diamond film

Cruz-Zaragoza

Gastélum

Quispe³

et al. 2010

Physica Status Solidi (a)

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“…TL measurements were performed at different times after irradiation. In a 24 h period the TL signal of samples stored in darkness fades about 20% which is quite good result in comparison to other studies . To study repeatability of readings five cycles of irradiation at 5 Gy followed by TL read‐out was performed.…”

Section: Resultsmentioning

confidence: 65%

TL characterization of CVD diamond films deposited at different growth parameters

Mitura‐Nowak

Karczmarska

Marczewska

et al. 2013

Physica Status Solidi (a)

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Phone: þ48 126 628 145, Fax: þ48 126 628 088Diamonds can be used as dosimeters due to their high sensitivity to the ionizing radiation, radiation hardness as well as mechanical and chemical resistance. Moreover diamond, as the allotropic form of carbon, is tissue-equivalent what is an important property in regard to its potential future application in medical physics. Diamond films deposited on Si substrates by chemical vapor deposition (CVD) method using SEKI plasma reactor at the Institute of Nuclear Physics in Krakow were investigated to the aspect of their thermoluminescent (TL)properties. The deposition was performed at different oxygen concentration and the thermoluminescence of diamond films was studied. All grown diamond films were characterized in terms of surface morphology (scanning electron microscopy), chemical (Raman spectroscopy) and structural properties (X-ray diffraction). The influence of three types of radiation: a ( 241 Am, 5.49 MeV), b ( 90 Sr/ 90 Y, 2.27 MeV), g ( 60 Co, 1250 keV) on the shape of the TL curves was also examined.

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“…Gastéluma and Cruz-Zaragoza [11] reported that the diamond films exhibited 3-5% TL reproducibility independent of the irradiation dose rate, which is comparable to commercial dosimeter materials. In [12] samples grown by the hot filament CVD method with thicknesses of 180 and 500 µm showing a linear dose behavior in the 1-50 Gy range were presented. Two samples with thicknesses of 6 and 12 µm prepared by MW CVD were studied in [6].…”

Section: Resultsmentioning

confidence: 99%

Study of the Thermoluminescence of CVD Diamond

et al. 2012

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This work reports some thermoluminescent properties of chemical vapour deposition diamond film grown by 5 kW microwave assisted plasma chemical vapour deposition. The 2 diamond sample with the thickness of 32 µm was exposed to gamma radiation in the dose range 0.6-55 Gy. The thermoluminescent glow curve of diamond sample displayed a peak with the maximum centered at 240• C. The linearity of the detector response in the range of 10-55 Gy was observed. The bleaching effect, seen as fading of the thermoluminescent signal when the device was exposed to light in the visible range, was also noticed. Two-dimensional dose distribution was measured using 2D thermoluminescent reader equipped with a sensitive 640 × 480 pixels charge coupled device camera. The surface morphology of the diamond film was observed with scanning electron microscope and atomic force microscope. The grain size was estimated as about 15 µm. The Raman spectroscopy was used to characterize phase purity. The width and position of the diamond Raman band around 1332 cm −1 indicated that the coating is crystalline and of good quality. It is concluded that good quality chemical vapour deposition diamond coating could be promising material for thermoluminescent dosimetry.

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γ radiation thermoluminescence performance of HFCVD diamond films

Cited by 18 publications

References 28 publications

Heating rate effects on the TL characteristics of hot filament CVD diamond film

Heating rate effects on the TL characteristics of hot filament CVD diamond film

TL characterization of CVD diamond films deposited at different growth parameters

Study of the Thermoluminescence of CVD Diamond

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