| Thermoluminescence technique is extended to the age determination of needs areas, such as early identification of antiquities, and later geology, oceanography, space science, Quaternary Research and other fields. However, TL is the application of basic research has always been an important prerequisite.1. Using of thermoluminescence technique produce the standard samples of L and Y, including the pre-processing laboratory, homogeneity test, outliers test and valuation of standard samples. The results provide a scientific, practical approach for producing massive geological standard samples with the luminescence method.2. Using the different diameter of L samples,11～40μm,40～74μm,74～100μm,100～150μm analyze the TL of them. The results that the different diameter of L samples with same doses is different, so the determination of particle size should be consistent and confined to a smaller range.3. Using the different quality of L samples analyze and compare the TL of them, the experimental results show that:when the quality of samples<4 mg, the TL increased with the quality accordingly, and there is good linear relationship between quality and TL for normalization.when the quality of samples> 6 mg, the TL does not tend to change, and there is not need to do the quality of normalization of the samples'TL and its quality.4. Using the different quality of L samples analyze and compare the dose response of them. the experimental results showed that:In the detection area of a certain case, the different quality samples of TL is same, and the does response exactly uniformly. Under the different detection area conditions, the amount of TL release different, and the slope that TL increased with the dose is inconsistency5. Using the different quality of Y samples do the experiment of light bleach test. TL values of surface samples receded about 85%(non-bleach component is not considered), the sample accumulated bleach TL level decreases with depth, and there is no change about the depth of 1000um.6. Using 93.1m samples of Changping drilling extract quartz, the experimental results showed that:2ml per gram samples with 40% HF dissolute about 80min, it can get the availability of pure quartz particles generally, but the dissolution time is not too long, and 300min is excessive loss of quartz, the treated samples are not suitable for TL measurement. Using 104m samples of Changping drilling that has extracted quartz analyze the interpretation of the relationship between its additional dose and TL. when its additional dose is less than 300Gy, the result release that there has a linear growth between the amount of TL and the dose, when its additional dose is more than 300Gy, the growth is nonlinear. For 104m sample, the amount of its natural TL that has been detected is in the nonlinear regions, and the 104m samples has reached the quartz saturation.7. The work tests the equivalent dose of the samples from source area and drainage area. It is proved that thermolμminescence dose decreased in order from source area to drainage area. The work compares to the amount TL of different layers of the debris flow sediment samples, it is showed that the annealing of nature thermolμminescence of fine-grained samples was larger than the coarse-grained samples. This paper argues that the mud-like platform is an ideal dating carrier. However the debris flow material annealing is not sufficient, it is need for correction of the background value and studying the mechanism of thermo-lμminescence attenuation. |
PDF Full Text Request