Abstract
The results of the response of various proton-recoil track detectors at different neutron energies and angles of incidence are presented. The angles were between the beam axis and the normal to the phantom front surface. The measurements were made for 144 and 565 keV neutrons at wedge angles of 0, 30, 60 and 85° and for high-energy neutrons of 44 and 66 MeV at 0°. The materials were chemical etch grade PN3 and electrochemical etch grade PN4 and PM. The PN3 gave a higher response than the PN4 and PM detectors by factors of up to ∼5. The effect of a polyethylene radiator was to increase the response by a factor of ∼5 at 144 keV and by a factor of ∼2 at 565 keV, but it had no or little effect on high-energy neutrons. The response of PN3 material was reduced by ∼40% at 30°. None of the materials used in this study showed any response at the wide angles of 60 and 85°.
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