METHOD FOR MEASURING ABSORPTION SPECTRUM AND MONOCHROMATOR THEREOF

摘要

PURPOSE: An absorption spectrum measuring method and a spectroscope are provided to optimally maintain the intensity of X-rays for measuring an absorption spectrum and to predict a proper detuning angle of a DCM(Double Crystal Monochromator) crystal. CONSTITUTION: An absorption spectrum measuring method is as follows. A rate of fundamental harmonics to 3rd-order harmonics is calculated based on a difference of an X-ray absorption of a plurality of media with respect to X-rays having energy larger than the absorption edge and an X-ray absorption of a plurality of media with respect to X-rays having energy smaller than the absorption edge(S310). An angle of a crystal of DCM is adjusted based on the rate of the fundamental harmonics with respect to the 3rd-order harmonics and the absorption spectrum of a sample is measured(S320). [Reference numerals] (AA) Start; (BB) End; (S310) Calculate the ratio of fundamental harmonics to 3rd-order harmonics; (S320) Adjust the angle between a first crystal and a second crystal