toxic levels are detectable. The limit of detectability is generally assumed to be three times the standard deviation of the background. Using our results, one can infer the detectability limits as a function of atomic number, and these results are shown in Figure 7. By increasing the bombarding time by a factor of four, the detectability limit will be improved by a factor of two.An important facet of any measuring technique is the Recently the utility of methods of separation in nuclear analyses has been enhanced by the development of sub-