Measurement of the neutron capture resonances for platinum using the Ge spectrometer and pulsed neutron beam at the J-PARC/MLF/ANNRI

¹ National Institute of Advanced Industrial Science and Technology, Research Institute for Measurement and Analytical Instrumentation, 1-1-1 Umezono Tsukuba Ibaraki, Japan
² Hokkaido University, Faculty of Engineering, Kita13 Nishi8 Kita-ku Sapporo, Japan
³ Japan Atomic Energy Agency, 2-4 Shirakata Shirane Tokai Naka Ibaraki, Japan
⁴ Nagoya University, Graduate School of Engineering, Furo-cho Chikusa-ku Nagoya, Japan

^a e-mail: koichi.kino@aist.or.jp

Published online: 13 September 2017

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 ¹⁹⁶Pt compound state to its ground state. The neutron capture cross-section for ¹⁹⁵Pt 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.