TIME AND FREQUENCY-RESOLVED ZEKE SPECTROSCOPY

ZEKE spectroscopy is based on delayed detection by pulsed field ioniza tion. It is thereby possible to monitor the time evolution at a given excitation frequency. Moreover, by varying the depth of detection, one can harvest different Rydberg series. The qualitative features expect ed for such a spectrum are discussed. The quantitative theory required to compute spectra is outlined and applied to the realistic example o f Na-2(+). The computed spectrum is found to very accurately exhibit t wo time scales, just as has been observed, with the shorter decay time being faster for lower Rydberg states. Extensive interseries coupling is noted.