Measurement of neutron capture cross section ratios of
Cm resonances using NNRI
Goko, Shinji*; Kimura, Atsushi
; Harada, Hideo
; Oshima, Masumi; Ota, Masayuki*; Furutaka, Kazuyoshi
; Kin, Tadahiro; Kitatani, Fumito
; Koizumi, Mitsuo
; Nakamura, Shoji
; Toh, Yosuke
; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Kiyanagi, Yoshiaki*; Kino, Koichi*; Furusaka, Michihiro*; Hiraga, Fujio*; Kamiyama, Takashi*; Hori, Junichi*; Fujii, Toshiyuki*; Fukutani, Satoshi*; Takamiya, Koichi*
To obtain the accurate nuclear data of minor actinides required for a nuclear transmutation system or an innovative nuclear fuel cycle system, measurement of neutron-capture cross section of
Cm was performed using NNRI installed at beam line No.4 (BL04) of MLF in J-PARC. Using "4
Ge spectrometer" that is a component of NNRI, neutron time of flight spectra and prompt
ray spectra were measured. Then neutron-capture cross section ratios of
Cm resonances were derived and compared with the evaluated values of JENDL-3.3. The previous experimental data was measured using a nuclear explosion as a pulsed neutron source, and the present result is the first time in the world that such measurements have been carried out at an accelerator facility. By developing techniques for more detailed analysis and improvement of the experimental conditions, the absolute values of capture cross section are expected to be obtained.