Secondary photon emission studies of ion bombarded beryllium

The secondary photon emission which arises during ion bombardment of Be metal foil by 200-3000 eV Kr+, Ar+, Ne+, O+2 and N+2 was studied. By measuring the secondary photon emission yield of four Be(I) and one Be(II) emission lines as a function of incident ion energy information pertinent to the excitation process was obtained. Using a model based on a velocity dependent excitation process, the random collision cascade theory of sputtering; and making allowance for non-radiative de-excitation of the excited sputtered atoms and/or ions, it was possible to account for the observed energy dependent yields. (orig./BHO)