レーザー光脱離を用いた長半減期放射性ヨウ素ー加速器質量分析法の高度化

摘要

Accelerator Mass Spectrometry (AMS) is used for the trace determination of long-lived radioisotopes at natural isotopic abundances or less. This paper shows some recent trends and developments for improving AMS using a laser photodetachment technique, including a specific application for trace ~(129)I determination. Advanced AMS for ~(129)I was designed based on the development of a negative pulsed ion source for iodine by laser ablation and intracavity second-harmonic generation of a pulsed injection-locked Ti:Sappnire laser for I-photodetachment.