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A resonance neutron imaging system has been developed based on combination of a glass based Gas Electron Multiplier (Glass GEM) detector and a resonance filter. This system has the capability of imaging the neutron spatial distribution in energy of resonance peaks corresponding to a resonance filter. A clear dip corresponding to a resonance peak of 109Ag (4.2∼6.3 eV) was confirmed in measured response...
We are developing a new type of manganese bath for determination of neutron emission rate of a radioactive neutron source. The manganese bath gas a multilayered structure composed of polyethylene plates and manganese alloy plates containing 70 % manganese. In measurements of neutron emission rate, a neutron source is set in the center of the manganese bath at first. 56Mn is produced by the 55Mn(n,γ)56Mn...
It is indispensable to precisely evaluate energy-dependent responses of neutron dosimeters and neutron detectors for radiation protection. The responses of neutron dosimeters are usually evaluated using calibration with monoenergetic neutrons and calculations. However, it is not easy to produce mono-energetic neutrons for the epi-thermal neutron region. In the present study, energy dependent response...
Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at the Research Center for Nuclear Physics (RCNP), Osaka University. The quasi-monoenergetic neutron field was generated by a reaction with the resulting spectra consisting of a monoenergetic high-energy peak followed...
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