Abstract
Both neutron spectrum and microdosimetric measurements have been made in a water phantom exposed to different field size therapy beams from the 62 MeV Clatterbridge cyclotron. The neutron spectrum measurements have been made using an NE213 detector and the procedures for measuring the response functions necessary for unfolding are described. The results of measurements both in air and in phantom are presented. The spectrum measurements show very significant in-beam hardening with depth into the phantom, and the microdosimetric measurements are consistent with this finding.
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