Excitation of $\text{PtI}$ Transitions Terminating on Singlet Levels

The method of extended crossing beams is used to investigate the excitation of platinum atom transitions terminating on singlet levels. Thirty eight excitation cross sections are measured at the electron energy of $30$ eV; nine optical excitation functions are recorded in the electron energy range from zero to $200$ eV. Also measured are eight excitation cross sections of transitions which have even upper levels. Possible excitation channels are discussed, which define the absolute values of cross sections and the form of optical excitation functions.