Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component

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Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component. / Timar-Gabor, A.; Vasiliniuc, S.; Vandenberghe, D. A. G.; Cosma, C.; Wintle, A. G.

In: Radiation Measurements, Vol. 47, No. 9, 09.2012, p. 740-745.

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Timar-Gabor, A. ; Vasiliniuc, S. ; Vandenberghe, D. A. G. ; Cosma, C. ; Wintle, A. G. / Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component. In: Radiation Measurements. 2012 ; Vol. 47, No. 9. pp. 740-745.

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@article{125fb67e2a394bd1a699cea8c2e5eee8,
title = "Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component",
abstract = "Fast component dominated quartz single aliquot regenerative dose optically stimulated luminescence (SAR-OSL) dose response curves that display continuing growth at high doses are increasingly reported in literature. This behaviour would result in higher equivalent doses being obtained. Here we document the characteristics of OSL signals from fine (4–11 μm) and coarse (63–90 μm) quartz extracted from Romanian loess that display such behaviour. For very high doses (>1 kGy up to 5–15 kGy) the data could be closely fitted to a double saturating exponential regression model. Nonetheless, the saturation charcteristics of these fine and coarse quartz grains are very different, with average saturation chracteristic doses of D01 ≈ 175 Gy and D02 ≈ 1800 Gy in the case of the fine material, while in the case of the coarse material values of D01 ≈ 55 Gy and D02 ≈ 600 Gy have been obtained. Our results imply a hitherto unexplained mechanism in OSL production at high doses and question the reliability of obtaining SAR-OSL equivalent doses in the high dose region when a second function is needed to describe the dose response.",
keywords = "quartz, OSL, dose reponse, saturation characteristics",
author = "A. Timar-Gabor and S. Vasiliniuc and Vandenberghe, {D. A. G.} and C. Cosma and Wintle, {A. G.}",
note = "Timar-Gabor, A., Vasiliniuc, S., Vandenberghe, D. A. G., Cosma, C., Wintle, A. G. (2012). Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component. Radiation Measurements, 47 (9), 740-745; Proceedings of the 13th International Conference on Luminescence and Electron Spin ; Conference date: 10-07-2011 Through 14-07-2011",
year = "2012",
month = sep,
doi = "10.1016/j.radmeas.2011.12.001",
language = "English",
volume = "47",
pages = "740--745",
journal = "Radiation Measurements",
issn = "1350-4487",
publisher = "Elsevier",
number = "9",

}

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TY - JOUR

T1 - Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component

AU - Timar-Gabor, A.

AU - Vasiliniuc, S.

AU - Vandenberghe, D. A. G.

AU - Cosma, C.

AU - Wintle, A. G.

N1 - Timar-Gabor, A., Vasiliniuc, S., Vandenberghe, D. A. G., Cosma, C., Wintle, A. G. (2012). Investigations into the reliability of SAR-OSL equivalent doses obtained for quartz samples displaying dose response curves with more than one component. Radiation Measurements, 47 (9), 740-745

PY - 2012/9

Y1 - 2012/9

N2 - Fast component dominated quartz single aliquot regenerative dose optically stimulated luminescence (SAR-OSL) dose response curves that display continuing growth at high doses are increasingly reported in literature. This behaviour would result in higher equivalent doses being obtained. Here we document the characteristics of OSL signals from fine (4–11 μm) and coarse (63–90 μm) quartz extracted from Romanian loess that display such behaviour. For very high doses (>1 kGy up to 5–15 kGy) the data could be closely fitted to a double saturating exponential regression model. Nonetheless, the saturation charcteristics of these fine and coarse quartz grains are very different, with average saturation chracteristic doses of D01 ≈ 175 Gy and D02 ≈ 1800 Gy in the case of the fine material, while in the case of the coarse material values of D01 ≈ 55 Gy and D02 ≈ 600 Gy have been obtained. Our results imply a hitherto unexplained mechanism in OSL production at high doses and question the reliability of obtaining SAR-OSL equivalent doses in the high dose region when a second function is needed to describe the dose response.

AB - Fast component dominated quartz single aliquot regenerative dose optically stimulated luminescence (SAR-OSL) dose response curves that display continuing growth at high doses are increasingly reported in literature. This behaviour would result in higher equivalent doses being obtained. Here we document the characteristics of OSL signals from fine (4–11 μm) and coarse (63–90 μm) quartz extracted from Romanian loess that display such behaviour. For very high doses (>1 kGy up to 5–15 kGy) the data could be closely fitted to a double saturating exponential regression model. Nonetheless, the saturation charcteristics of these fine and coarse quartz grains are very different, with average saturation chracteristic doses of D01 ≈ 175 Gy and D02 ≈ 1800 Gy in the case of the fine material, while in the case of the coarse material values of D01 ≈ 55 Gy and D02 ≈ 600 Gy have been obtained. Our results imply a hitherto unexplained mechanism in OSL production at high doses and question the reliability of obtaining SAR-OSL equivalent doses in the high dose region when a second function is needed to describe the dose response.

KW - quartz

KW - OSL

KW - dose reponse

KW - saturation characteristics

UR - http://hdl.handle.net/2160/35948

U2 - 10.1016/j.radmeas.2011.12.001

DO - 10.1016/j.radmeas.2011.12.001

M3 - Article

VL - 47

SP - 740

EP - 745

JO - Radiation Measurements

JF - Radiation Measurements

SN - 1350-4487

IS - 9

T2 - Proceedings of the 13th International Conference on Luminescence and Electron Spin

Y2 - 10 July 2011 through 14 July 2011

ER -

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