The effects of deep trap population on the thermoluminescence of Al2O3:C

Yukihara, E.G.; Whitley, V. H.; Polf, Jerimy; Klein, David M.; McKeever, S.W.S.; Akselrod, A. E.; Akselrod, M.S.

doi:10.1016/s1350-4487(03)00077-5

Cited by 183 publications

(97 citation statements)

References 25 publications

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“…Figure 1 depicts the dose dependence of the dosimetric peak at $210 C as measured through the 'blue' filter. The initial slope on the log-log scale is $1.15, meaning a weak superlinearity as reported before (10) . The weak peak at $320 C is also shown (the scale is Â20 in the given arbitrary units), yielding a slope of $2 at 1 Gy, which gradually decreases to $1 at $100 Gy.…”

Section: Resultssupporting

confidence: 64%

“…The slight superlinearity of the main peak at $200 C observed previously (10) , is accompanied by a significantly stronger superlinearity of the higher temperature peaks. A crude separation between the blue and UV emissions of the high temperature TL has been performed by the use of glass filters (see below).…”

Section: Introductionsupporting

confidence: 52%

“…Although there is some overlap in the transmission of the two filters used, we tend to believe that following beta irradiation, the emission is due to the Fþh ($330 nm) and F þ þe ($420 nm) reactions as previously suggested for X-ray and UV irradiated samples (6,9) for the same peaks. As pointed out in the introduction, the concentration of the F-and F þ -centres do not change significantly neither during the excitation nor during the heating stage (10) . This seems to rule out the possibility that the strong superlinearity is due to competition during heating, since, in this situation, both the concentrations of the trapping state and the luminescence centre are dependent on the excitation dose more or less linearly, but owing to the presence of a strong competitor, the TL intensity is proportional to the product of these two concentrations.…”

Section: Discussionmentioning

confidence: 72%

“…In a recent paper, Yukihara et al (10) studied in detail the behaviour of the main peak at $180 C following beta irradiation. For one batch of samples studied, B1040, the dose dependence has been found to be slightly superlinear in the range of 1-50 Gy.…”

Section: Introductionmentioning

confidence: 99%

“…They also report effects of sensitisation and desensitisation, which, along with the superlinearity, are explained by competition processes associated with a deep hole trap and a deep electron trap that become unstable at 530-600 and 830-930 C, respectively. Yukihara et al (10) suggest that the reactions Fþh!F þ and F þ þe!F are nearly balanced and, therefore, the concentrations of the F-and F þ -centres do not change significantly.…”

Section: Introductionmentioning

confidence: 99%

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Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Lawless

Chen

2006

Radiation Protection Dosimetry

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We report on strong superlinearity of high temperature (300-700 C) thermoluminescence (TL) peaks in a-Al 2 O 3 :C powder. The main dosimetric peak at $200 C, previously found to exhibit slight superlinearity, is now shown to yield a slope of $1.15 on a log(intensity) vs. log(dose) curve. Higher temperature peaks at $320, 450 and 650 C, previously reported following UV and X-ray excitation, have now been observed after beta irradiation and showed stronger superlinearity. Using a blue filter, the weak peak at $320 C started about quadratically and the slope on the log-log scale decreased gradually from 2 to about unity at $100 Gy. The two higher temperature peaks at $450 and $650 C also exhibited a strong superlinear dose dependence in this dose range, with an average slope of $2. Roughly similar behaviour has been found when a UV filter was used. The possible explanation of the strong superlinearity is discussed.

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Section: Resultssupporting

confidence: 64%

Section: Introductionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Lawless

Chen

2006

Radiation Protection Dosimetry

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References

2011

Optically Stimulated Luminescence

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Use of the LM-OSL technique for the detection of partial bleaching in quartz. Radiat. Meas., 32, 419-425. Aguirre, J., Alvarez, P., Followill, D. et al. (2009) SU-FF-T-306: Optically stimulated light dosimetry: commissioning of an optically stimulated luminescence (OSL) system for remote dosimetry audits, the Radiological Physics Center Experience. A procedure for the distinction between static and dynamic radiation exposures of personal radiation badges using pulsed optically stimulated luminescence. A radiation dosimetry method using pulsed optically stimulated luminescence. Acute dosimetry consensus committee recommendations on biodosimetry applications in events involving uses of radiation by terrorists and radiation accidents. Radiat. Meas., 42, 972-996. Almond, P.R. (2009) A historical perspective: a brief history of dosimetry, calibration protocols, and the need for accuracy, in A mini X-ray generator as an alternative to a 90 Sr/ 90 Y beta source in luminescence dating.

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References

2011

Thermally and Optically Stimulated Luminescence

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The effects of deep trap population on the thermoluminescence of Al2O3:C

Cited by 183 publications

References 25 publications

Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

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