2 the experimental principle and method of beam - foil spectroscopy are presented , and the application of the isoelectronic sequence in the analyses of spectra is described , cowan program for the theoretical calculations is introduced
2.
4 the spectrum of highly ionized cu and ge was investigated by means of the beam - foil technique . by comparison with other experimental data we determined 42 energy levels of cu and 13 energy levels of ge . for the spectrum without experimental data for comparison , they are determined by isoelectronic sequence
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