Laser spectroscopy of CdKr molecules in ultraviolet region

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2002-10, Vol.58 (12), p.2709-2724
• Main Authors: Koperski, J., Łukomski, M., Czajkowski, M.
• Format: Article
• Language: English
• Subjects: Cadmium - chemistry; Cadmium–krypton molecule; Electrons; Krypton - chemistry; Lasers; Molecular potential parameters; Potential energy curve; Spectrometry, Fluorescence; Supersonic expansion; Ultraviolet Rays; Van der Waals molecule
• ISSN: 1386-1425
• DOI: 10.1016/S1386-1425(02)00027-6

Excitation spectra of the A0 +(5 3P 1)←X0 +(5 1S 0), B1(5 3P 1)←X0 + and D1(5 1P 1)←X0 + transitions as well as a fluorescence spectrum of the D1 v′=16 →X0 + transition in CdKr van der Waals molecule has been recorded in an experiment of a continuous supersonic molecular beam crossed with a pulsed dye laser beam. A rigorous analysis of the excitation spectra based on Birge–Sponer and LeRoy–Bernstein methods aided with a computer calculation, utilizing a program of near dissociation expansion lead to the X0 +- and improved A0 +-, B1- and D1-state characterizations. Evidence of a theoretically predicted potential barrier within the B1-state well was found and discussed with regard to the latest result of ab initio calculation. An analysis of bound-bound and bound-free parts of the fluorescence spectrum confirmed a v′-assignment and indicated that Morse and Maitland–Smith M-S ( n 0, n 1) functions are adequate representations of the bound well and repulsive wall of the X0 +-state potential energy curve, respectively. All spectroscopic characteristics obtained in this work are compared with newest theoretical studies of this complex.