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Study of neutron capture reactions using the 4$$pi$$ Ge spectrometer

Harada, Hideo ; Goko, Shinji*; Kimura, Atsushi; Ota, Masayuki*; Oshima, Masumi; Kitatani, Fumito; Toh, Yosuke ; Furutaka, Kazuyoshi; Kin, Tadahiro; Koizumi, Mitsuo; Nakamura, Shoji; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Osaki, Toshiro*; Hori, Junichi*; Fujii, Toshiyuki*; Takamiya, Koichi*; Goto, Jun*; Kiyanagi, Yoshiaki*; Kino, Koichi*; Furusaka, Michihiro*; Hiraga, Fujio*; Kamiyama, Takashi*

For the improvement of the accuracy on the neutron capture cross sections, a 4$$pi$$ Ge spectrometer was developed. The 4$$pi$$ Ge spectrometer is a unique tool due to its superior energy resolution for studying properties on neutron capture reactions, not only capture cross sections but also resonance identification, $$gamma$$-ray intensity distribution, and spin-parity assignment. For example, its performance on the resonance identification was demonstrated using a $$^{rm nat}$$Ag sample. On the measurement of a $$gamma$$-ray intensity distribution for each resonance, the results of $$^{238}$$U will be shown. Using the 4$$pi$$ Ge spectrometer, the measurements of neutron capture cross sections were started at the J-PARC/MLF/ANNRI. The preliminary results on the measurements of neutron capture cross sections will be discussed mainly based on measurements of neutron capture cross sections for $$^{241}$$Am, together with related techniques.

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Category:Physics, Multidisciplinary

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