Neutron capture cross-section measurements at TC-Pn in KUR for nuclides of concern in decommissioning

Nakamura, Shoji  ; Endo, Shunsuke   ; Rovira Leveroni, G.   ; Kimura, Atsushi   ; Shibahara, Yuji*

The present work is an attempt to measure the thermal-neutron capture cross-sections for some nuclides which are of importance in decommissioning to evaluate produced radioactivity. This work selected some of objective nuclides for decommissioning, such as Fe, Er and Hf, and measured thermal-neutron capture cross-sections for these nuclides by a neutron activation method at Kyoto University Research Reactor. The present results were obtained as follows:1.230.03 barn for Fe(n,)Fe reaction, 8.190.35 barn for Er(n,)Er reaction and 13.570.14 barn for Hf(n,)Hf reaction. As a by-product, the measurement of Hf sample also presented 0.4270.006 barn for Hf(n,)Hf reaction. It has been revealed that the data adopted in an evaluated data library differ from the present results by more than experimental uncertainties.