Nondestructive quantitative isotopic analysis using nuclear resonance fluorescence
Omer, M.
; Shizuma, Toshiyuki*; Hajima, Ryoichi*; Koizumi, Mitsuo 
A quantitative isotopic analysis of the natural metallic samples of hafnium (Hf) and tungsten (W) elements is presented. Hf and W targets were exposed to quasi-monochromatic
-ray beams generated by laser Compton scattering (LCS) at the high intensity
-ray source (HI
S) facility of Duke University. The
-ray beams, in the 2.4-3.2 MeV energy range, excited multiple nuclides simultaneously via the nuclear resonance fluorescence (NRF). All excited transitions were employed to analyze the isotopic compositions of the targets. Particularly, the content of the even-mass naturally occurring isotopes of Hf and W was detected with high precision. The uncertainty of the measured abundances is 2.7-6.7%, while the deviation from the reference values ranges between 0.18-1.36%. This work is a contribution of the JAEA to the International Atomic Energy Agency (IAEA) under the agreement of the coordinated research program (CRP), J02015 (Facilitation of Safe and Secure Trade Using Nuclear Detection Technology - Detection of RN and Other Contraband). This work was a part of a study of the nuclear resonance fluorescence aiming at nuclear security and safeguards applications, being supported by the subsidiary for "promotion of strengthening nuclear security or the like" of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.