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Neutron capture cross sections of curium isotopes measured with ANNRI at J-PARC

Kawase, Shoichiro* ; Kimura, Atsushi  ; Harada, Hideo  ; Iwamoto, Nobuyuki ; Iwamoto, Osamu ; Nakamura, Shoji ; Segawa, Mariko  ; Toh, Yosuke  

The neutron capture cross sections of $$^{244}$$Cm and $$^{246}$$Cm were measured for the neutron energy range of 1-1000 eV via the neutron time-of-flight method with ANNRI at MLF of the J-PARC. The world's most intense neutron pulses from the Japan Spallation Neutron Source enable the accurate measurement of neutron capture cross sections. Besides, single-bunched neutron pulses allow the analysis in a higher neutron energy region than the previous measurement at ANNRI. The resonance analyses were performed up to 1000 eV by using a resonance shape analysis code REFIT. The spectra of prompt gamma-rays from neutron capture reactions of $$^{244}$$Cm and $$^{246}$$Cm were also obtained, and 43 and 10 prompt gamma-ray peaks from $$^{244}$$Cm(n,$$gamma$$) and $$^{246}$$Cm(n,$$gamma$$) reactions were newly observed, respectively.

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Category:Nuclear Science & Technology

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