Sensitivity correction method of optically stimulated luminescence dating experiment

Abstract

The invention provides a sensitivity correction method of an optically stimulated luminescence dating experiment. The sensitivity correction method comprises the following steps of, in each loop teststep, calculating a regenerative-dose luminescence signal value and a test-dose luminescence signal value which are obtained through measurement, and acquiring a current regenerative-dose sensitivitychange value, wherein the current regenerative-dose sensitivity change value is a change quantity of the luminescence signal value measured by an equivalent regenerative dose; correcting the current regenerative-dose sensitivity change value, and obtaining a corrected regenerative-dose sensitivity change value, wherein a current test-dose sensitivity change value is a difference value between thetest-dose luminescence signal value measured in a previous loop test step and a current test-dose luminescence signal value measured in a current loop test step; and correcting the current test-dose sensitivity change value, and obtaining a corrected test-dose sensitivity change value. The sensitivity correction method can be used for effectively optimizing a correction method of a sensitivity change, so as to improve the test accuracy and reliability of an equivalent dose of a sample.

Description

technical field [0001] The invention relates to the technical field of correction of experimental dose sensitivity changes, in particular to a sensitivity correction method for optical luminescence dating experiments. Background technique [0002] OSL dating is the determination of the age of the last exposure event in sediments. Since the method was proposed in the 1980s, it has been more and more widely used. Compared with 14C dating, although OSL dating has the disadvantage of large error (generally 5%-10%), it has the following obvious advantages: ① its dating range is much larger than the former; ② dating materials ( Quartz or feldspar), which is especially important in deserts and lakes in arid and semi-arid regions, because it is difficult to find organic matter for 14C dating in these areas; ③ is the direct dating of sediments; ④ dating events include Exposure, heat (above 400°C), volcanoes, earthquakes, and crystal (calcite, etc.) formation, etc. [0003] The exp...

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Problems solved by technology

[0005] The embodiment of the present invention provides a sensitivity correction method for the optical luminescence dating experiment, so as to solve the problem of the measurement accuracy of the equivalent dose of the sample caused by the unsatisfactory technique of correcting the change of the sensitivity in the existing optical luminescence dating experiment. And the technical problems with low reliability, so as to effectively optimize the correction method of the change of sensitivity, and then improve the test accuracy and reliability of the equivalent dose of the sample

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