INTENSITY PERTURBATIONS IN THE EPSILON(+)=2, 1 AND 0 BANDS OF THE ZERO-KINETIC-ENERGY (ZEKE) PHOTOELECTRON-SPECTRUM OF N-2(1).
J ELECTRON SPECTROSC
151 - 166.
The observation of the nu(+) = 2 band in the first electronic system of the one-photon zero-kinetic-energy (ZEKE) photoelectron spectrum of N-2 is reported for the first time. The band was recorded using a coherent extreme ultraviolet source, tunable around 130 000 cm(-1); the use of a new two-photon resonance at 98 855.87 cm(-1) for sum-frequency mixing in krypton is discussed. The new ZEKE photoelectron band shows marked intensity perturbations, similar to the nu(+) = 1 band previously reported, and these are attributed to a final-state interaction with a Rydberg slate belonging to the A (2) Pi(u) series. A calculation to model the interactions in both the nu(+) = 1 and nu(+) = 2 bands is presented. A new calculation of rotational autoionization rates is also described for Rydberg levels converging to the nu(+) = 0 limit; these rates determine the observed intensity perturbations in the 0 and M branches of the nu(+) = 0 band of the ZEKE spectrum.
|Title:||INTENSITY PERTURBATIONS IN THE EPSILON(+)=2, 1 AND 0 BANDS OF THE ZERO-KINETIC-ENERGY (ZEKE) PHOTOELECTRON-SPECTRUM OF N-2(1)|
|Keywords:||INDUCED ROTATIONAL AUTOIONIZATION, DIATOMIC-MOLECULES, ELECTRIC-FIELD, PHOTOIONIZATION, SPECTROSCOPY, N2, THRESHOLD, ABSORPTION, NITROGEN|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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