The 480 nm system of KRb: 1 (3)Delta(1), 4 (1)Sigma(+), and 5 (1)Sigma(+) States

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We have investigated the KRb 480 nm system by mass-resolved resonance enhanced two-photon ionization in a cold molecular beam. The 1 (3)Delta(1), 4 (1)Sigma(+), and 5 (1)Sigma(+) <- X (1)Sigma(+) transitions have been identified. For the 1 (3)Delta(1) and 5 (1)Sigma(+) states, the electronic term values and vibrational constants are determined experimentally for the first time. Potential energy curves of the 4 (1)Sigma(+) and 5 (1)Sigma(+) states undergo multiple avoided crossings with nearby (1)Sigma(+) states in the observed spectral region. For the 4 (1)Sigma(+) state, a vibrational numbering of the experimentally observed levels is suggested. Anomalies in vibronic structures of the 4 (1)Sigma(+) and 5 (1)Sigma(+) states are understood by comparison with high-level ab initio calculations currently available. The avoided crossing energies are also experimentally estimated.
Publisher
AMER CHEMICAL SOC
Issue Date
2010-07
Language
English
Article Type
Article
Keywords

ENHANCED 2-PHOTON IONIZATION; PULSED MOLECULAR-BEAM; RESONANCE POLARIZATION SPECTROSCOPY; ELECTRONIC-STATE; (KRB)-K-39-RB-85; TRANSITIONS; SPECTRA; RBCS; RB-2; BANDS

Citation

JOURNAL OF PHYSICAL CHEMISTRY A, v.114, no.29, pp.7742 - 7748

ISSN
1089-5639
DOI
10.1021/jp1028799
URI
http://hdl.handle.net/10203/98202
Appears in Collection
CH-Journal Papers(저널논문)
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