Radiation Studies around Extracted Proton Beams at Nimrod

Measurements are reported of the major dose contributing components of the secondary radiation produced by the interaction of 7 GeV particles in external targets. Standard dosimetry techniques were used involving flux density determination from activation detectors and dose equivalent estimation using threshold techniques, films and thermoluminescent detectors. Comparison is made between measured values of neutron flux density and those calculated using a simple shield model.