ELEMENTS DISTRIBUTION

SNMS spectrum of a "pure" Ge-sample taken with an Ar⁺ ion bombarding voltage of 1.4 keV (red) in comparison with the signals for ion bombardment at about 30 eV (black). Note the low mass independent background of 4·10^-1 cps and the signals in the "residual gas" range. The C-signal refers to a carbon impurity of about 11 ppm in the Ge-sample.