Development of swift, non-destructive, highly sensitive trace element analysis utilizing multiple -ray detection method

Oshima, Masumi; Toh, Yosuke   ; Koizumi, Mitsuo ; Kin, Tadahiro; Hara, Kaoru; Kimura, Atsushi   ; Furutaka, Kazuyoshi  ; Nakamura, Shoji  ; Murakami, Yukihiro*; Sushida, Kazuyoshi*; Kojima, Norihisa*

A new trace element analysis method is proposed on the basis of multiple -ray detection, which is two or higher fold -ray coincidence method. We apply this method for prompt -ray activation analysis (PGAA) and instrumental neutron activation analysis (INAA). The advantage of the methods consists of high energy resolution and high sensitivity. The principle of the multiple -ray detection method and actual applications to cosmological chemistry, earth chemistry, environmental chemistry, etc, will be presented.