Co-60 in lunar samples.

Results obtained for Co-60 in lunar soils and rocks of different depths are discussed. These results are compared to a production calculation based on the work of Lingenfelter et al. (1972). The measurement of Co-60 activities can give information about the present-day equilibrium neutron flux in the lunar regolith. The most important quantity which can be derived from these data is the absolute present-day lunar neutron production rate.