Neutron Fluxes Underground

Abstract

Eugster (1954) reported the neutron flux under 2100 m rock (5880 m water equivalent) to be 26 times that at the ground surface and suggested that radiation was coming from the centre of the Earth. An attempt has been made to confirm this interesting finding by comparing the neutron flux in the Broken Hill mines with that at ground level. Although the counting statistics are rather meagre they should be sufficient to reveal such a marked effect as claimed in the Swiss experiment.