Measurement of Neutron Capture Gamma Rays from the Resonances of Zr-91 and Zr-96 at the J-PARC/MLF/ANNRI

作者：Hori J^*; Furutaka K; Goko S; Harada H; Kimura A; Kin T; Kitatani F; Koizumi M; Nakamura S; Ohta M; Oshima M; Toh Y; Igashira M; Katabuchi T; Mizumoto M; Kamiyama T; Kino K; Kiyanagi Y

来源：Journal of the Korean Physical Society, 2011, 59(2): 1777-1780.

DOI：10.3938/jkps.59.1777

• Zr-91
• Zr-96
• Neutron capture reaction
• TOF method
• 4 pi Ge spectrometer
• J-PARC
• MLF
• Resonance

The prompt gamma rays from the neutron capture reactions by Zr-91 and Zr-96 were measured. A neutron time-of-flight (TOF) method was adopted with a 4 pi Ge spectrometer installed at the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC Material and Life science experimental Facility (MLF). The gamma-ray pulse-height spectra corresponding to the 292-eV resonance of Zr-91 and the 301-eV resonance of Zr-96 were obtained by gating on the TOP regions, respectively. The relative intensities of those transitions were derived. Moreover, we have demonstrated the nuclide discrimination technique by identifying Zr-91 resonances (isotopic composition of 5.3%) in the measurement of Zr-96 sample. This technique can be applicable to the neutron capture measurement for a small amount of sample expected in case of long-lived fission products (LLFPs) such as Zr-93.

• 出版日期2011-8-11