Experiments indicate that over a volume of 0.1 cubic cm the beam intensity was uniform, making a 1 g sample of the eutectic mixture the most suitable. Zirconia and Mylar foil proved to the most suitable comparable standards for the oxygen and carbon respectively. These standards indicated that at maximum beam intensity 154 counts per minute micron g were obtained from oxygen and 60 cpm/micron g of carbon at the end of the irradiation.