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Report No.

Measurement of atmospheric neutron and photon energy spectra at aviation altitudes using a phoswich-type neutron detector

Takada, Masashi*; Yajima, Kazuaki*; Yasuda, Hiroshi*; Sato, Tatsuhiko; Nakamura, Takashi*

Neutron energy spectrum from 7 to 180 MeV and photon energy spectrum from 3.5 to 42 MeV were measured on board an aircraft using a newly-developed phoswich-type neutron detector at 10.8 km altitude over Japan. The measured neutron energy spectrum using the phoswich neutron detector was compared with other on-board measurements using a multi-sphere moderator neutron detector, so called Bonner ball and the measurement on the ground using an organic liquid scintillator, and with the calculations using the LUIN2000, EXPACS and RMC codes.



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Category:Nuclear Science & Technology



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