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Characteristics of Pulsed Blue and Green Light Stimulated Luminescence Signals of Quartz and Feldspars

Jintang Qin
Jintang Qin
, 
Jie Chen
Jie Chen
 and 
Kechang Li
Kechang Li
   | Dec 31, 2021
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Published Online: Dec 31, 2021
Page range: 138 - 146
Received: Feb 13, 2019
Accepted: Jul 30, 2020
DOI: https://doi.org/10.2478/geochr-2020-0038
Keywords
© 2019 Jintang Qin et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Time resolved post-IR PBLSL and post-IR PGLSL curves of the quartz and K-feldspars. TR-post-IR PBLSL curves for a) bright quartz of Q-HD and b) K-feldspar of F-NTS, and TR-post-IR PGLSL curves for c) bright quartz of Q-HD and d) K-feldspar of F-NTS. The channel width is 512 ns and the photon count rate is the integration of signal during the initial 2.4 s stimulation. The curves are truncated at 700 μs for clarity. The vertical dashed lines in a) and c) indicate the timing of the end of on-period and off-period for the subsequent post-IR PBLSL and post-IR PGLSL measurements.
Time resolved post-IR PBLSL and post-IR PGLSL curves of the quartz and K-feldspars. TR-post-IR PBLSL curves for a) bright quartz of Q-HD and b) K-feldspar of F-NTS, and TR-post-IR PGLSL curves for c) bright quartz of Q-HD and d) K-feldspar of F-NTS. The channel width is 512 ns and the photon count rate is the integration of signal during the initial 2.4 s stimulation. The curves are truncated at 700 μs for clarity. The vertical dashed lines in a) and c) indicate the timing of the end of on-period and off-period for the subsequent post-IR PBLSL and post-IR PGLSL measurements.

Fig. 2

The raw and normalized post-IR PBLSL (dashed line) and post-IR PGLSL (solid line) decay curves for quartz and feldspars. a) and e) quartz of Q-CAL; b) and f) quartz of Q-HD; c) and g) quartz of Q-QB; d) and h) feldspar of F-PST. The effective stimulation time is calculated by multiplying the ratio of the on period to the sum of on and off period with the total stimulation time.
The raw and normalized post-IR PBLSL (dashed line) and post-IR PGLSL (solid line) decay curves for quartz and feldspars. a) and e) quartz of Q-CAL; b) and f) quartz of Q-HD; c) and g) quartz of Q-QB; d) and h) feldspar of F-PST. The effective stimulation time is calculated by multiplying the ratio of the on period to the sum of on and off period with the total stimulation time.

Fig. 3

Variation of the integrated luminescence intensity (circle) and their associated relative counting error (square) for the post-IR PBLSL (open symbol) and post-IR PGLSL (solid symbol) signals of quartz aliquots. a) Q-CAL; b) Q-HD and c) Q-QB.
Variation of the integrated luminescence intensity (circle) and their associated relative counting error (square) for the post-IR PBLSL (open symbol) and post-IR PGLSL (solid symbol) signals of quartz aliquots. a) Q-CAL; b) Q-HD and c) Q-QB.

Fig. 4

Variation of the normalized post-IR PBLSL (circle) and post-IR PGLSL (square) intensity on the pulsed stimulation temperature for quartz and feldspars. a) Q-CAL; b) Q-HD; c) Q-QB; d) Q-NTS; e) F-PST and f) F-NTS. The signal intensity was integrated using the initial 0.4 s effective stimulation time with subtraction of the integration of the last 1 s effective stimulation time.
Variation of the normalized post-IR PBLSL (circle) and post-IR PGLSL (square) intensity on the pulsed stimulation temperature for quartz and feldspars. a) Q-CAL; b) Q-HD; c) Q-QB; d) Q-NTS; e) F-PST and f) F-NTS. The signal intensity was integrated using the initial 0.4 s effective stimulation time with subtraction of the integration of the last 1 s effective stimulation time.

Fig. 5

Variation of the relative feldspar contribution to the post-IR PBLSL (open circle) and post-IR PGLSL (solid square) signals with the integration period for the hypothetical quartz (Q-HD) and feldspar (F-NTS) mixture under various pulsed stimulation temperatures. a) 25°C; b) 50°C; c) 75°C; d) 100°C; e) 125°C and f) 150°C.
Variation of the relative feldspar contribution to the post-IR PBLSL (open circle) and post-IR PGLSL (solid square) signals with the integration period for the hypothetical quartz (Q-HD) and feldspar (F-NTS) mixture under various pulsed stimulation temperatures. a) 25°C; b) 50°C; c) 75°C; d) 100°C; e) 125°C and f) 150°C.

Fig. 6

Variation of the relative feldspar contribution to the post-IR PBLSL (open circle) and post-IR PGLSL (solid square) signals with the integration period for the hypothetical quartz (Q-NTS) and feldspar (F-NTS) mixture under various pulsed stimulation temperatures. a) 25°C; b) 50°C; c) 75°C; d) 100°C; e) 125°C and f) 150°C.
Variation of the relative feldspar contribution to the post-IR PBLSL (open circle) and post-IR PGLSL (solid square) signals with the integration period for the hypothetical quartz (Q-NTS) and feldspar (F-NTS) mixture under various pulsed stimulation temperatures. a) 25°C; b) 50°C; c) 75°C; d) 100°C; e) 125°C and f) 150°C.

Fig. 7

Variation of the normalized post-IR PBLSL (circle) and post-IR PGLSL (square) intensity with the temperature of IR stimulation prior to the pulsed stimulation for quartz and feldspars. a) Q-CAL; b) Q-HD; c) Q-QB; d) Q-NTS; e) F-PST and f) F-NTS. The signal intensity was integrated using the initial 0.4 s effective stimulation time with subtraction of the integration of the last 1 s effective stimulation time.
Variation of the normalized post-IR PBLSL (circle) and post-IR PGLSL (square) intensity with the temperature of IR stimulation prior to the pulsed stimulation for quartz and feldspars. a) Q-CAL; b) Q-HD; c) Q-QB; d) Q-NTS; e) F-PST and f) F-NTS. The signal intensity was integrated using the initial 0.4 s effective stimulation time with subtraction of the integration of the last 1 s effective stimulation time.

Fig. 8

Box plots of De values measured by various measurement procedures. a) post-IR PGLSL and b) post-IR PBLSL stimulated at 25°C; c) post-IR PGLSL and d) post-IR PBLSL stimulated at 125°C. The De value determined by the conventional BLSL signal of quartz of 17YDE2C is shown in d).
Box plots of De values measured by various measurement procedures. a) post-IR PGLSL and b) post-IR PBLSL stimulated at 25°C; c) post-IR PGLSL and d) post-IR PBLSL stimulated at 125°C. The De value determined by the conventional BLSL signal of quartz of 17YDE2C is shown in d).

List of samples investigated in this study.

Origin Mineral Grain size (μm)
Qaidam Basin, dune sands Quartz, Q-QB 125–180
Otindag Desert, dune sands Quartz, Q-HD 125–180
Northern Tian Shan, fluvial sands Quartz, Q-NTS; K-feldspar, F-NTS 125–180
DTU Risø laboratory Quartz, Q-CAL 90–180
Shantou Perthite, F-PST 90–125
Qaidam Basin, dune sands* Quartz, 17YDE2C 125–180
Junggar Basin, dune sands* K-feldspar, 15MNS01 125–180

Procedures for investigating the characteristics of post-IR PBLSL and post-IR PGLSL signals.

Step Treatment Observation
1 Give dose, DR Gy
2 Preheat at 260°C for 10 s
3 IR stimulation for 100 s at TIR
4 Pulsed blue light stimulation for 200 s at TBL Post-IR PBLSL
5 Give dose, DR Gy
6 Preheat at 260°C for 10 s
7 IR stimulation for 100 s at TIR
8 Pulsed green light stimulation for 200 s at TGL Post-IR PGLSL
9 Return to step 1
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Language:
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