Abstract
The neutron capture cross-section for platinum was measured at J-PARC/MLF/ANNRI. The intense pulsed neutron beam was impinging on a natural platinum foil sample and the emitted prompt γ-rays were detected by a Ge spectrometer. The peak energies of the low energy resonances for natural platinum are consistent with those of the JEFF-3.1.2, RUSFOND2010 and next-JENDL data libraries except for the 20-eV resonance. The resonance cross-sections of the next-JENDL library do not contradict the present measurements within the uncertainty of the absolute value of the present work. We analysed the prompt γ-ray spectrum and found a clear 7921.93 keV peak that originates from the transition from the 196 Pt compound state to its ground state. The neutron capture cross-section for 195 Pt was obtained by choosing events of this peak. The peak energies of most of the low energy resonances are almost consistent with those of the RUSFOND2010 and next-JENDL libraries. However, there was a disagreement for the 20-eV resonance.
Highlights
Platinum is one of the most important elements in our society and is widely used as a catalyst
The normalization was performed by setting the cross section of the present work at 12-eV resonance to the value given by the next-JENDL library
The neutron capture cross-section for platinum was measured at Japan Proton Accelerator Research Complex (J-PARC)/Material and Lifescience Experimental Facility (MLF)/Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI)
Summary
Platinum is one of the most important elements in our society and is widely used as a catalyst. It is used to purify car exhaust gases and generate electricity in fuel cells. In car exhaust applications platinum’s activity as a catalyst deteriorates due to coupling to sulphur compounds. In the case of the fuel cell, deterioration occurs due to coupling to carbon monoxide. In order to investigate and improve these applications, non-destructive imaging methods may be useful. One such method is neutron resonance absorption spectroscopy (N-RAS) [1, 2]. This method is based on the irradiation of a sample by a pulsed neutron beam. We performed a capture cross-section measurement using the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) [9] in the Material and Lifescience Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC)
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