Nuclear Radiation Detection for the Natural Environment

Liquid scintillators, proportional counters, nuclear emulsions, etched track detectors, and thermoluminescent crystals have been used to measure the enviromental neutron flux from thermal to 10 MeV energies, below ground, at ground level, at an air-water interface, on a tower, and at an airborne altitude of 20,000 feet. Results are compared with calculations based on a modified program for reactor computations.