Figure 1
Typical luminescence signals from sample N-1. A) Thermoluminescence (TL); B) Isothermal thermoluminescence (ITL).
Figure 2
Schematic running sequences of luminescence protocols. A) MAA-TL, B) MAR-TL, C) MAA-ITL, D) MAR-ITL and E) SAR-ITL protocols.
Figure 3
Typical growth (dose response) curves of the luminescence signals of protocols. A) MAA-TL, B) MAR-TL, C)MAA-ITL, D) MAR-ITL and E) SAR-ITL protocols.
Figure 4
The SAR-ITL protocol dose recovery test results.
Figure 5
Comparison of K-feldspar De results of the MAA-TL, MAR-TL, MAA-ITL, MAR-ITL and SAR-ITL protocols.
Table 1
Evaluation form of MAA-TL, MAR-TL, MAA-ITL, MAR-ITL and SAR-ITL protocols.
| MAA-TL | MAR-TL | MAA-ITL | MAR-ITL | SAR-ITL | |
|---|---|---|---|---|---|
| TL peaks (geothermometers) can be measured in one run | ✓ | ✓ | ✘ | ✘ | ✘ |
| Well studied kinetics parameters | ✓ | ✓ | ✘ | ✘ | ✘ |
| Multiple aliquots protocol requires shorter machine time | ✓ | ✓ | ✓ | ✓ | ✘ |
| TL glow curves indicate the thermal stability | ✓ | ✓ | ✘ | ✘ | ✘ |
| Overcome weak ITL signals problem | ✓ | ✓ | ✘ | ✘ | ✘ |
| Sensitivity change of reheating can be minimized | ✓ | ✘ | ✓ | ✘ | ✘ |
| Apply to ITL signals components fitting | ✘ | ✘ | ✓ | ✓ | ✓ |
| Don’t need normalization | ✘ | ✘ | ✘ | ✘ | ✓ |
| Avoid overlapping TL peaks | ✘ | ✘ | ✓ | ✓ | ✓ |
| Overcome the atmosphere protection of the TL oven | ✘ | ✘ | ✓ | ✓ | ✓ |
| Overcome blackbody radiation | ✘ | ✘ | ✓ | ✓ | ✓ |
| Need less sample materials | ✘ | ✓ | ✘ | ✓ | ✓ |
| Obtain De by interpolation from growth curve | ✘ | ✓ | ✘ | ✓ | ✓ |
| Advantage ✓ | Disadvantage ✘ | ||||
Table 2
Fugong valley samples De results determined using MAR-TL and SAR-ITL protocols.
| Sample | De of MAR-TL (Gy) | De of SAR-ITL (Gy) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| At 250°C | At 260°C | At 270°C | At 280°C | At 290°C | At 300°C | At 310°C | At 320°C | At 330°C | At 235°C | At 255°C | |
| FG-A | 23.9±3.1 | 33.7±4.8 | 50.1±7.5 | 76.9±11.2 | 116.5±15.2 | 167.6±19.5 | 227.2±23.8 | 287.5±27.1 | 342.4±30.9 | 56.1±12.3 | 146.0±9.1 |
| FG-B | 20.8±2.8 | 30.1±4.2 | 47.3±6.4 | 77.0±9.5 | 123.6±13.2 | 189.5±16.6 | 271.2±19.4 | 361.4±21.7 | 449.9±23.6 | 73.7±11.2 | 203.7±15.6 |
| FG-C | 29.5±3.7 | 43.1±5.6 | 65.2±8.2 | 99.4±11.5 | 147.9±14.8 | 209.1±16.8 | 276.1±17.1 | 340.4±16.3 | 395.1±17.1 | 109.8±7.0 | 243.2±14.5 |