Measurement of the resonance integral for the 115In(n, γ)116In reaction

The resonance integral of the In-115(n, gamma)In-116 reaction has been measured by using the Kyoto University Reactor (KUR) of the Research Reactor Institute, Kyoto University (KURRI), which has a 1/E standard neutron spectrum field. The activation method was employed to measure the resonance integral. A high-purity Ge (HPGe) detector was used to measure the gamma-rays from the irradiated In-115 sample and the Au-197 monitor wire. A flux monitor wire, where was a Au/Al alloy wire, was irradiated together with the In/Al alloy sample to measure the neutron flux at the irradiation position. The resonance integral was obtained relative to the reference value (1550 +/- 28 b) for the Au-197(n, gamma)Au-198 reaction. The current resonance integral was obtained as 3275 +/- 134 b. Our previous result (differential data) obtained by using a time-of-flight method with a linac is close to the current result, within the experimental error. The previous measurements, the results evaluated in ENDF/B-VI, and Mughabghab's data are also in good agreement with the current result within the experimental error. However, the JENDL-3.3 and the JEF-2.2 results are a little lower.