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Journal Articles

Multiple $$gamma$$-ray detection method and its application to nuclear chemistry

Oshima, Masumi; Toh, Yosuke; Hatsukawa, Yuichi; Koizumi, Mitsuo; Kimura, Atsushi; Haraga, Tomoko; Ebihara, Mitsuru*; Sushida, Kazuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 278(2), p.257 - 262, 2008/11

https://doi.org/10.1007/s10967-008-0303-9
 Times Cited Count：24 Percentile：81.47(Chemistry, Analytical)

It is well known that most radioactive nuclides emit coincident multiple $$gamma$$-rays. The multiple $$gamma$$-ray detection method takes advantage of this feature and the $$gamma$$-rays are detected in coincidence with a $$gamma$$-ray detector array. From the correlated data we can create a $$gamma$$-$$gamma$$ two-dimensional matrix or $$gamma$$-$$gamma$$-$$gamma$$ three-dimensional cube. On this matrix or cube an energy resolution much better than the ordinary one-dimensional spectrum can be achieved. Furthermore signal-to-noise ratio is considerably improved. Hence this method can be applied widely to radioactive nuclide analysis. In the talk I will present its typical application to the analysis of nuclear waste, neutron activation analysis (NAAMG), and prompt $$gamma$$-ray analysis (MPGA).

Oral presentation

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

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

no journal, , 

A new trace element analysis method is proposed on the basis of multiple $$gamma$$-ray detection, which is two or higher fold $$gamma$$-ray coincidence method. We apply this method for prompt $$gamma$$-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 $$gamma$$-ray detection method and actual applications to cosmological chemistry, earth chemistry, environmental chemistry, etc, will be presented.

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