Investigation on thermally assisted optically stimulated luminescence (TA – OSL) signal in various sodium chloride samples

Majgier, Renata; Biernacka, Magdalena; Palczewski, Piotr; Mandowski, A.; Polymeris, George S.

doi:10.1016/j.apradiso.2018.10.019

Cited by 7 publications

(3 citation statements)

References 55 publications

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“…The other two TL measurements are quite important, as the comparison between the S f and the S 0 glow curves (before and after the TA-OSL measurement, respectively) provides strong indications regarding possible changes in either TL glow curve shape or sensitivity. Despite the fact that TA-OSL was reported to induce shape changes in many luminescence phosphors such as Al 2 O 3 :C [ 21 ] and halites [ 28 ], the shape of the TL glow curve of BeO does not change after TA-OSL measurement. Moreover, the corresponding ratio of

provides for each TL peak a measure of sensitization; this plot is presented in Figure 5 for both TL peaks.…”

Section: Resultsmentioning

confidence: 99%

“…The experimental protocols that were applied constitute modified versions of the protocols that have been previously used for the study of TA-OSL in the cases of Al 2 O 3 :C [ 21 ] as well as of NaCl [ 28 ]. Two major protocols were applied, one for the selection of the appropriate stimulation temperature of the TA-OSL measurement, along with one that studies the dosimetric properties of the corresponding signal.…”

Section: Methodsmentioning

confidence: 99%

“…Nevertheless, the favorable properties of TA-OSL for either dating or dosimetric applications are not reported for all materials. Typical examples include NaCl [ 28 ] and MgO (under preparation).…”

Section: Introductionmentioning

confidence: 99%

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Thermally Assisted Optically Stimulated Luminescence (TA-OSL) from Commercial BeO Dosimeters

Polymeris

2023

Materials

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BeO is another luminescent phosphor with very deep traps (VDTs) in its matrix that could not be stimulated using either thermal or conventional optical stimulations. The present study attempts to stimulate these traps using thermally assisted optically stimulated luminescence (TA-OSL), a combination of simultaneous thermal and optical stimulation that is applied to the material following a thermoluminescence measurement up to 500 °C. An intense, peak-shaped TA-OSL signal is measured throughout the entire temperature range between room temperature and 270 °C. This signal can be explained as the transfer of charges from VDTs to both dosimetric TL traps. Experimental features such as the peaked shape of the signal along with the presence of residual TL after the TA-OSL suggest that recombination of TA-OSL takes place via the conduction band. Isothermal TA-OSL is not effective for extending the maximum detection dose thresholds of BeO, unlike minerals such as quartz and aluminum oxide. Nevertheless, TA-OSL could be effectively used in order to either (a) control the occupancy of VDTs, circumventing the intense sensitivity changes induced by long-term uses and high accumulated dose to the VDTs, or (b) measure the total dose accumulated over a series of repetitive dose calculations.

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provides for each TL peak a measure of sensitization; this plot is presented in Figure 5 for both TL peaks.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%