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Report No.

Characterization of quasi-monoenergetic neutron energy spectra using the $$^{7}$$Li(p,n) reactions in the 245 and 388 MeV

Iwamoto, Yosuke   ; Hagiwara, Masayuki*; Satoh, Daiki   ; Iwase, Hiroshi*; Yashima, Hiroshi*; Itoga, Toshiro*; Sato, Tatsuhiko   ; Nakane, Yoshihiro  ; Nakashima, Hiroshi; Sakamoto, Yukio; Matsumoto, Tetsuro*; Masuda, Akihiko*; Nishiyama, Jun*; Nakamura, Takashi*; Tamii, Atsushi*

We have measured mono-energetic neutron energy spectra for the $$^{7}$$Li(p,n) reaction in the energy region above 2 MeV using the time-of-flight method at RCNP, Osaka University. Neutron detector were NE213 organic liquid scintillators (5.08 cm, 12.7 cm, and 25.4 cm diameter and thickness). Detection angles were 0, 2.5, 5, 10, 15, 20, 25, and 30 degrees. As spectra consist of a high-energy peak and a continuum down to the low energy, the observed data caused by the continuum was subtracted to obtain the peak neutron cross sections. While the 0 deg component contains both the peak and the continuum, the 10-30 deg component is considered to contain mainly the continuum. The angular distribution of the peak neutron cross section agreed with the Taddeucci formula.



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