Nondestructive detection of isotopes using nuclear resonance fluorescence with laser Compton scattering -rays

Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Kikuzawa, Nobuhiro ; Katsumura, Soichiro; Seya, Michio; Harada, Hideo ; Toyokawa, Hiroyuki*; Kii, Toshiteru*; Ogaki, Hideaki

We propose a non-destructive assay method for measuring an isotope and a chemical compound hidden by heavy shields such as iron plates of a thickness of several centimeters. We use a nuclear resonance fluorescence (NRF) measurement technique with an energy tunable laser Compton scattering (LCS) -ray source. Isotope mapping of a block of $^{208}$ Pb concealed in an iron box of 1.5 cm thickness has been demonstrated. We also demonstrate detection of a chemical compound of melamine, C $_{3}$ H $_{6}$ N $_{6}$ , shielded by 15-mm-thick iron and 4-mm-thick lead plates. We measure NRF -rays of $^{12}$ C and $^{14}$ N of the melamine by using the LCS -rays of the energies of up to 5.0 MeV. The observed ratio ( $^{12}$ C/ $^{14}$ N) $_{rm exp}$ = 0.39 0.12 is consistent with (C/N) $_{rm melamine}$ = 0.5.

Language	:	English
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Meeting title	:	International Conference on Nuclear Data for Science and Technology (ND 2010)
Held date	:	2010/04
Location (city)	:	Jeju
Location (country)	:	Korea
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Registration No. : BB20100333
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