Secondary Emission from Films of Platinum on Aluminum

Abstract

Experimental results for secondary emission from films of platinum on aluminum indicate a direct proportionality between the primary energy (up to 800 electron volts) and the maximum depth from which the secondaries come. The depths of origin of secondaries as indicated by these studies are not out of line with those which would be expected on the basis of existing theories. The maximum depth within the target influencing the secondary emission increases more rapidly for primary energies above 800 electron volts than for those below.