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INTENSITY PERTURBATIONS IN THE EPSILON(+)=2, 1 AND 0 BANDS OF THE ZERO-KINETIC-ENERGY (ZEKE) PHOTOELECTRON-SPECTRUM OF N-2(1)

WILSON, SHS; REDNALL, RJ; FIELDING, HH; MERKT, F; SOFTLEY, TP; (1993) 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 , 66 (1-2) 151 - 166.

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Abstract

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.

Type:Article
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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