[3H05-10] Technologies for Dismantling, Decontamination and Evaluation

[3H09] Development of Sr-90 analytical system based on highly sensitive laser absorption spectroscopy utilizing molecular isotope shifts

*Ryohei Terabayashi¹, Masahiro Sakurai¹, Kaoru Inoue¹, Yusuke Maruyama¹, Masabumi Miyabe², Shuichi Hasegawa¹ (1. UTokyo, 2. JAEA)

Keywords:Strontium-90, Laser spectroscopy, Cavity ringdown spectroscopy, Trace analysis, Molecular spectroscopy

As a rapid analytical method of a long half-life radionuclide Sr-90, the system based on cavity ring down spectroscopy (CRDS) utilizing molecular isotope shifts has been proposed, which is a highly sensitive laser absorption spectroscopy enhanced by an optical resonator. The results of an investigation of the target molecule including Sr as well as the molecular vibrational and rotational transitions by an emission spectroscopy will be shown.