Sorting a large set of heavily used LiF:Mg,Ti thermoluminescent detectors into repeatable subsets of similar response

Kearfott, Kimberlee J.; Newton, Jill P.; Rafique, Muhammad

doi:10.1016/j.apradiso.2014.10.019

Cited by 5 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…OSL has become an accepted personnel dosimetry method during the past two decades, primarily because of the success of a commercially-available dosemeter based upon anion-defective, carbondoped aluminum oxide, or α-Al 2 O 3 :C (Luxel s , Landauer, Inc., 2 Science Road, Glenwood, Illinois, 60425-1586, USA, custserv@-landauer.com, þ1 800 323 8830, www.landauer.com). Thermoluminescent dosemeters (TLDs) long dominated personnel dosimetry, and they are well characterized (Samei et al, 1994;Kearfott et al, 1995Kearfott et al, , 2000Kearfott et al, , 2015Simpkins and Kearfott, 1997;Harvey et al, 2011) and have tissue-equivalent forms essential for meaningful application to medical applications (Kearfott and Grupen-Shemansky, 1990;Kearfott et al, 1990). Unfortunately, TLDs are subject to signal fading post-irradiation (Harvey et al, 2010(Harvey et al, , 2011, which is particularly significant at high ambient temperatures (Harvey and Kearfott, 2012).…”

Section: Introductionmentioning

confidence: 98%

The optically stimulated luminescence (OSL) properties of LiF:Mg,TI, Li2B4O7:CU, CaSO4:Tm, and CaF2:MN thermoluminescent (TL) materials

Kearfott

West²,

Rafique

2015

Applied Radiation and Isotopes

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

The optically stimulated luminescence (OSL) properties of LiF:Mg,TI, Li2B4O7:CU, CaSO4:Tm, and CaF2:MN thermoluminescent (TL) materials

Kearfott

West²,

Rafique

2015

Applied Radiation and Isotopes

Self Cite

View full text Add to dashboard Cite

“…Environmental conditions may produce inaccuracies in personnel and environmental dosimeters, such as mechanical and humidity effects on pencil ionisation chambers [1], sunlight on optically stimulated luminescent dosimeters [2], and heat on film [3] and thermoluminescent dosimeters (TLDs) [4]. The calibration and statistical performance of TLDs has been well studied [5,6], but the not all environmental effects have been reported.…”

Section: Introductionmentioning

confidence: 99%

Doses to LiF :Ti, Mg chips encapsulated in plastic extremity rings as a result of radon gas exposure

2015

Self Cite

View full text Add to dashboard Cite

Previous studies measured the effects of (222)Rn on various thermoluminescent dosemeters (TLDs). This study quantified the effects of (222)Rn on LiF : Ti,Mg chips encapsulated in plastic extremity rings. For 28 d, one batch of TLDs was left in a chamber with high radon levels, and another batch in a control chamber with normal background radon levels. A few TLDs in each batch were removed from the rings for direct exposure to the ambient air in each chamber. Passive continuous radon monitors (CRMs) recorded the (222)Rn levels. TLDs were processed using a third-party dosimetry company, CRM data were analysed, and the relationship between integrated (222)Rn concentration and TLD response was determined. The batch of TLDs in the experimental chamber showed a weak response to (222)Rn gas, which was in the order of 0.5 nSv Bq(-1) m(3) d(-1).

show abstract

Calibration and Statistical Performance of Al2O3:C Optically Stimulated Luminescent Dosimeters With and Without Annealing Using a 137Cs Source

et al. 2019

View full text Add to dashboard Cite

A series of experiments were conducted using commercially available Al2O3:C optically stimulated luminescent dosimeters to provide a technical basis for their precise calibration and statistical performance at irradiated air kerma doses between 0.02 mGy and 5 mGy using 137Cs. This study examines the dose response linearity, studies the background signal for annealed dosimeters, and compares the statistical performance of dosimeters that were annealed and not annealed prior to their irradiation and readout. The average and standard deviation for the response of groups of dosimeters annealed and nonannealed prior to their irradiation were determined at each delivered dose. The batch of dosimeters that were annealed prior to their irradiation exhibited a coefficient of variation in its mean dose response below 10% when using three or more irradiation trials at each delivered air kerma dose between 0.02 mGy and 5 mGy. The reader calibration factor was calculated using the response of the annealed batch of dosimeters and was determined to be 756 ± 7 photomultiplier tube counts per mGy. Best estimates of the individual sensitivity factors were determined to be between 0.79 and 1.12 for the annealed batch of dosimeters. The minimum number of irradiations required to accurately determine the sensitivity factor of each individual dosimeter is reported with the recommended reader and dosimeter calibration procedures.

show abstract

Sorting a large set of heavily used LiF:Mg,Ti thermoluminescent detectors into repeatable subsets of similar response

Cited by 5 publications

References 19 publications

The optically stimulated luminescence (OSL) properties of LiF:Mg,TI, Li2B4O7:CU, CaSO4:Tm, and CaF2:MN thermoluminescent (TL) materials

The optically stimulated luminescence (OSL) properties of LiF:Mg,TI, Li2B4O7:CU, CaSO4:Tm, and CaF2:MN thermoluminescent (TL) materials

Doses to LiF :Ti, Mg chips encapsulated in plastic extremity rings as a result of radon gas exposure

Calibration and Statistical Performance of Al2O3:C Optically Stimulated Luminescent Dosimeters With and Without Annealing Using a 137Cs Source

Contact Info

Product

Resources

About