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Neutron capture study using the ANNRI

Harada, Hideo   ; Fujii, Toshiyuki*; Fukutani, Satoshi*; Furutaka, Kazuyoshi ; Goko, Shinji*; Hara, Kaoru; Hirose, Kentaro  ; Hori, Junichi*; Igashira, Masayuki*; Kamiyama, Takashi*; Katabuchi, Tatsuya*; Kimura, Atsushi   ; Kin, Tadahiro; Kino, Koichi*; Kitatani, Fumito  ; Kiyanagi, Yoshiaki*; Koizumi, Mitsuo ; Mizumoto, Motoharu*; Nakamura, Shoji  ; Ota, Masayuki*; Oshima, Masumi; Takamiya, Koichi*; Toh, Yosuke   

The Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) has been installed at the beam line no. 4 of the Material and Life science experimental Facility (MLF) in the J-PARC. It was constructed in order to supply accurate neutron capture cross sections of minor actinides and fission products required for developing innovative nuclear systems. The ANNRI project team has started the measurements of neutron capture cross sections of minor actinides and fission products, and successfully obtained the neutron capture cross sections of these isotopes at the resonance energy region, including $$^{244}$$Cm. The ANNRI is a unique instrument for high-resolution neutron-capture $$gamma$$-ray spectroscopy by utilizing the high-intensity pulsed-neutron beam and the high-efficiency Ge spectrometer. It is expected to be used not only for the development of innovative nuclear systems, but also for the study of nuclear astrophysics and for the analyses of trace elements.

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