Response of the Victoreen 440 RF/C and the Rad-Owl RO-1 Survey Meters to Low Energy Photons (<66 keV) for Narrow Beam Geometries

Low energy bremsstrahlung photons were utilised to investigate the axial and radial response of the Victoreen 440 RF/C and the Rad-Owl RO-1 detectors under narrow beam geometries. The results demonstrate significant differences between the two instruments and suggest that such response data are detector model specific. Radial response appears to be energy independent above 52.5 keV, with larger differences expected for photon energies