PFI-ZEKE spectra of atomic uranium recorded via the intermediate state ( configuration) at using pulsed electric fields with amplitudes of 71 and , applied after photoexcitation. The vertical line to the right of the PFI-ZEKE features indicates the energy of the ground state. This line also coincides with the high-energy edges of the peaks, indicating that the effect of the stray electric fields is within error range of the IE measurements.
Rotationally resolved REMPI spectrum of the 0-0 transition of UO.
PFI-ZEKE spectra for UO recorded via specific rotational levels of the intermediate state [19.453]3. The spectra show the rotational structure for the level. These data were obtained using a pulsed electric field of , applied after photoexcitation. The spectra are plotted against total energy of the transition from the UO , state.
PFI-ZEKE spectra for UO recorded via specific rotational levels of the intermediate state [19.453]3 using a pulsed field with an amplitude of . The spectra show the rotational manifold of the (1)2.5 level. The spectra are plotted against total energy of the transition from the UO , state.
Observed low-lying electronic states ( and 1 only) for the configuration of , arranged according to energy and .
Ionization energy of U atom: comparison to previous measurements.
Term energies and molecular constants for the low-lying states of . (Vibrational constants given in brackets are values.)
Experimental and theoretical term energies for the low energy states of .
Comparison of experimentally observed and calculated [value of the fitted LFT parameters are , , , (fixed)] term energies and rotational constants [the deperturbed value was obtained by setting the calculated value for the ground state to the experimental value] (in ) for the states of .
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