Laser induced breakdown spectroscopy of the uranium including calcium; Time resolved measurement spectroscopic analysis (Contract research)

Akaoka, Katsuaki ; Maruyama, Yoichiro; Oba, Masaki ; Miyabe, Masabumi   ; Otobe, Haruyoshi  ; Wakaida, Ikuo  

For the remote analysis of low DF TRU (Decontamination Factor Transuranic) fuel, Laser Breakdown Spectroscopy (LIBS) was applied to uranium oxide including a small amount of calcium oxide. The characteristics, such as spectrum intensity and plasma excitation temperature, were measured using time-resolved spectroscopy. As a result, in order to obtain the stable intensity of calcium spectrum for the uranium spectrum, it was found out that the optimum observation delay time of spectrum is 4 microseconds or more after laser irradiation.