New luminescence measurement facilities in retrospective dosimetry

Publication: Research - peer-reviewConference article – Annual report year: 2012

Standard

New luminescence measurement facilities in retrospective dosimetry. / Lapp, Torben; Jain, Mayank; Thomsen, Kristina Jørkov; Murray, Andrew S.; Buylaert, Jan-Pieter.

In: Radiation Measurements, Vol. 47, No. 9, 2012, p. 803-808.

Publication: Research - peer-reviewConference article – Annual report year: 2012

Harvard

APA

CBE

MLA

Vancouver

Author

Lapp, Torben; Jain, Mayank; Thomsen, Kristina Jørkov; Murray, Andrew S.; Buylaert, Jan-Pieter / New luminescence measurement facilities in retrospective dosimetry.

In: Radiation Measurements, Vol. 47, No. 9, 2012, p. 803-808.

Publication: Research - peer-reviewConference article – Annual report year: 2012

Bibtex

@article{d9e5e3baf3194955a48c83f9235a4076,
title = "New luminescence measurement facilities in retrospective dosimetry",
publisher = "Pergamon",
author = "Torben Lapp and Mayank Jain and Thomsen, {Kristina Jørkov} and Murray, {Andrew S.} and Jan-Pieter Buylaert",
year = "2012",
doi = "10.1016/j.radmeas.2012.02.006",
volume = "47",
number = "9",
pages = "803--808",
journal = "Radiation Measurements",
issn = "1350-4487",

}

RIS

TY - CONF

T1 - New luminescence measurement facilities in retrospective dosimetry

A1 - Lapp,Torben

A1 - Jain,Mayank

A1 - Thomsen,Kristina Jørkov

A1 - Murray,Andrew S.

A1 - Buylaert,Jan-Pieter

AU - Lapp,Torben

AU - Jain,Mayank

AU - Thomsen,Kristina Jørkov

AU - Murray,Andrew S.

AU - Buylaert,Jan-Pieter

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - This paper gives a review of recent developments in luminescence measurement facilities on the Risø TL/OSL reader including radio-luminescence (RL), exo-electron and violet stimulation attachments, and a method for characterising and if necessary correcting for beta irradiation source non-uniformity.We first describe improvements to the existing RL option to allow near infra-red detection (NIR) during irradiation by the built-in 90Sr/90Y beta source. The RL optical signal is collected by a liquid light guide through an F34-901 interference filter and detection is based on a dedicated thermoelectrically cooled NIR sensitive PMT (detection window peak at 855 nm, FWHM 27 nm). Software and electronics have been modified to allow standard TL and OSL measurements in the same sequence as RL measurements. Together with a new bleaching source based on a high-power UV LED (395 nm; 700 mW/cm2), this facility has been used to measure natural doses in feldspar using the decaying NIR RL signal.Secondly, we present a method for mapping radiation field of the built-in 90Sr/90Y β-source and estimating grain-location specific dose-rates. This is important for the accuracy of single grain results, when radiation field is spatially non-uniform across the sample area. We document the effect of this correction method and further investigate on the effect of lifting the source to achieve a better dose-rate uniformity.Finally we summarise two recently-developed novel facilities to help investigate (i) the time scales involved in OSL processes (time-resolved exo-electron detection) and (ii) extending the age range (violet stimulated signals from deep quartz OSL traps).

AB - This paper gives a review of recent developments in luminescence measurement facilities on the Risø TL/OSL reader including radio-luminescence (RL), exo-electron and violet stimulation attachments, and a method for characterising and if necessary correcting for beta irradiation source non-uniformity.We first describe improvements to the existing RL option to allow near infra-red detection (NIR) during irradiation by the built-in 90Sr/90Y beta source. The RL optical signal is collected by a liquid light guide through an F34-901 interference filter and detection is based on a dedicated thermoelectrically cooled NIR sensitive PMT (detection window peak at 855 nm, FWHM 27 nm). Software and electronics have been modified to allow standard TL and OSL measurements in the same sequence as RL measurements. Together with a new bleaching source based on a high-power UV LED (395 nm; 700 mW/cm2), this facility has been used to measure natural doses in feldspar using the decaying NIR RL signal.Secondly, we present a method for mapping radiation field of the built-in 90Sr/90Y β-source and estimating grain-location specific dose-rates. This is important for the accuracy of single grain results, when radiation field is spatially non-uniform across the sample area. We document the effect of this correction method and further investigate on the effect of lifting the source to achieve a better dose-rate uniformity.Finally we summarise two recently-developed novel facilities to help investigate (i) the time scales involved in OSL processes (time-resolved exo-electron detection) and (ii) extending the age range (violet stimulated signals from deep quartz OSL traps).

U2 - 10.1016/j.radmeas.2012.02.006

DO - 10.1016/j.radmeas.2012.02.006

JO - Radiation Measurements

JF - Radiation Measurements

SN - 1350-4487

IS - 9

VL - 47

SP - 803

EP - 808

ER -