Precision spectroscopy and comprehensive analysis of perturbations in the A1∏(v = 0) state of 13C18O. (2nd January 2019)

• Record Type: Journal Article
• Authors: Hakalla, R.; Trivikram, T. M.; Heays, A. N.; Salumbides, E. J.; de Oliveira, N.; Field, R. W.; Ubachs, W.
• Is Part Of: Molecular physics. Volume 117:Number 1(2019)
• Page Start: 79
• Page End: 96
• Publication Date: 2019-01-02
• Subjects: Laser spectroscopy -- Fourier-transform spectroscopy -- carbon monoxide -- isotopologues -- deperturbation analysis; Molecules -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Molécules -- Périodiques; Chimie physique et théorique -- Périodiques; 539.6.05
• DOI: 10.1080/00268976.2018.1495848
• Languages: English
• ISSNs: 0026-8976

Abstract

ABSTRACT: We have reinvestigated the A level of 13 C 18 O using new high-resolution spectra obtained via multi-photon laser excitation as well as with synchrotron-based Fourier-transform absorption spectroscopy of the A, e, d, a, and a bands. In addition, Fourier-transform emission spectroscopy in the visible range is performed on the band. Spectra of the B band are measured in order to tie information from the latter emission data to the level structure of A . The high pressures in the absorption cell at the synchrotron and the high temperatures in the emission discharge permitted monitoring of high rotational quantum levels in A up to J =43. All information, in total over 900 spectral lines, was included in an effective Hamiltonian analysis of the A levels that are directly perturbed by the e, d, a, D, I close-lying levels and the e, d, a remote levels, as well being indirectly influenced by the a state. The influence of 9 further perturber levels and their interactions was investigated and are not significant for reproducing the present experimental data. This analysis leads to a much improved description in terms of molecular constants and interaction parameters, compared to previous studies of the same energy region for other CO isotopologues. GRAPHICAL ABSTRACT: