Journal article
Experimental and theoretical study of the np sigma 1 Sigma(+)(u) (n >= 4) N=0 excited states of D-2: Absolute absorption cross sections and branching ratios for ionization, dissociation and fluorescence
Publication Details
Authors: | Glass-Maujean, M.; Vasserot, A.; Jungen, C.; Schmoranzer, H.; Knie, A.; Kübler, S.; Ehresmann, A. |
Publisher: | ACADEMIC PRESS INC ELSEVIER SCIENCE |
Publication year: | 2016 |
Journal: | Journal of Molecular Spectroscopy |
Pages range : | 25-32 |
Volume number: | 320 |
Start page: | 25 |
End page: | 32 |
Number of pages: | 8 |
ISSN: | 0022-2852 |
DOI-Link der Erstveröffentlichung: |
Abstract
The absolute absorption cross sections for photoexcitation of D-2 to N = 0 Rydberg levels have been measured at a resolution of 0.001 nm in the 123,500-135,000 cm(-1) spectral range. The experimental energies and line intensities are compared with ab initio multichannel quantum defect (MQDT) calculations of the n >= 4 np sigma 1 Sigma(+)(u) N = 0 levels of D-2. The calculations provide theoretical values of level positions, line intensities and autoionization widths. They are based on quantum-mechanical clamped-nuclei potential energy curves and dipole transition moments available for the lowest Rydberg members of the np sigma series. The overall agreement between experiment and theory is good. The decay dynamics of the excited N = 0 Rydberg levels is discussed based on the observed quantum yields for ionization, dissociation and fluorescence, and is compared with the yields previously observed in the analogous states of the H-2 isotopomer. (C) 2016 Elsevier Inc. All rights reserved.
The absolute absorption cross sections for photoexcitation of D-2 to N = 0 Rydberg levels have been measured at a resolution of 0.001 nm in the 123,500-135,000 cm(-1) spectral range. The experimental energies and line intensities are compared with ab initio multichannel quantum defect (MQDT) calculations of the n >= 4 np sigma 1 Sigma(+)(u) N = 0 levels of D-2. The calculations provide theoretical values of level positions, line intensities and autoionization widths. They are based on quantum-mechanical clamped-nuclei potential energy curves and dipole transition moments available for the lowest Rydberg members of the np sigma series. The overall agreement between experiment and theory is good. The decay dynamics of the excited N = 0 Rydberg levels is discussed based on the observed quantum yields for ionization, dissociation and fluorescence, and is compared with the yields previously observed in the analogous states of the H-2 isotopomer. (C) 2016 Elsevier Inc. All rights reserved.
Keywords
Analysis by multichannel quantum defect theory, Synchrotron-based absorption spectroscopy of H-2
