Journal article
Dissociation of NO b ³Π0,1,2 npλ ²Λ(v = 0) Rydberg states into O((⁴S)3s ³S₀) + N(⁴S3/2) fragments: Rotational band shapes of vibronic peaks seen in fluorescence
Publication Details
Authors: | Ehresmann, A.; Liebel, H.; von Kröger, M.; Schmoranzer, H. |
Publication year: | 2001 |
Journal: | Journal of Physics B: Atomic, Molecular and Optical Physics |
Pages range : | 2893-2904 |
Volume number: | 34 |
Issue number: | 14 |
ISSN: | 0953-4075 |
Abstract
NO fluorescence excitation spectra of undispersed VUV fluorescence (λfl = 115-200nm) have been measured simultaneously with the absorption for exciting-photon energies between 16.0 and 16.57eV with a very narrow bandpass (ΔE = 1.6meV at 15.9eV) using monochromatized synchrotron radiation as the exciting-photon source. In this energy range the observed fluorescence intensity stems from neutral excited dissociation fragments O((4S)3s 3S1) only and represents a measure for fragment-state-selective dissociation into pairs O((4S)3s 3S1) + N(4S3/2). Due to the narrow exciting-photon bandwidth it was possible for the first time to observe the band shapes of vibronic peaks corresponding to the dissociation of NOb 3Π npπ/σ(v = 0) Rydberg states. These shapes have been compared with band shapes calculated via the intensity distribution caused by the different rotational states belonging to the vibronic level.
NO fluorescence excitation spectra of undispersed VUV fluorescence (λfl = 115-200nm) have been measured simultaneously with the absorption for exciting-photon energies between 16.0 and 16.57eV with a very narrow bandpass (ΔE = 1.6meV at 15.9eV) using monochromatized synchrotron radiation as the exciting-photon source. In this energy range the observed fluorescence intensity stems from neutral excited dissociation fragments O((4S)3s 3S1) only and represents a measure for fragment-state-selective dissociation into pairs O((4S)3s 3S1) + N(4S3/2). Due to the narrow exciting-photon bandwidth it was possible for the first time to observe the band shapes of vibronic peaks corresponding to the dissociation of NOb 3Π npπ/σ(v = 0) Rydberg states. These shapes have been compared with band shapes calculated via the intensity distribution caused by the different rotational states belonging to the vibronic level.
