@misc{oai:repo.qst.go.jp:00067492, author = {高田, 真志 and 高田 真志}, month = {Oct}, note = {Neutron irradiation for radiobiology has been done at the cyclotron facility in National Institute of Radiological Sciences since 2001, because RBE data for neutrons have to be acquired for radiation protection. Fast neutrons were produced at the beryllium target by bombarding 25 MeV deuterons. Neutron energy and absorbed dose spectra, and spatial distribution were necessary for studying the effects of neutron on organisms. Neutron energy spectra and angular distribution were measured with the liquid scintillator and the Bonner sphere neutron detectors. The measured energy spectra cover from thermal to 30 MeV, maximum neutron energy. Absorbed dose distributions were measured by using the tissue equivalent proportional counter, covering lineal energy from 0.1 to 2000 keV/micron. Spatial distribution was measured by using the technique combined with aluminum activation and image plates. These spectra have been compared with reference data and calculation., Ninth Symposium on Neutron Dosimetry}, title = {Characteristics of fast neutron field for radiobiology}, year = {2003} }