Resonant two-photon ionization spectroscopy of jet-cooled RuC
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 (United States)
A resonant two-photon ionization study of the jet-cooled RuC molecule has identified the ground state as a {sup 1}{Sigma}{sup +} state arising from the 10{sigma}{sup 2}11{sigma}{sup 2}5{pi}{sup 4}2{delta}{sup 4} configuration. The {sup 3}{Delta}{sub i} state arising from the 10{sigma}{sup 2}11{sigma}{sup 2}5{pi}{sup 4}2{delta}{sup 3}12{sigma}{sup 1} configuration lies very low in energy, with the {sup 3}{Delta}{sub 3} and {sup 3}{Delta}{sub 2} components lying only 76 and 850 cm{sup {minus}1} above the ground state, respectively. Transitions from the Xthinsp{sup 1}{Sigma}{sup +}, {sup 3}{Delta}{sub 3}, and {sup 3}{Delta}{sub 2} states to the {sup 3}{Pi}{sub 2}, {sup 3}{Pi}{sub 1}, {sup 3}{Phi}{sub 3}, {sup 3}{Phi}{sub 4}, {sup 1}{Phi}{sub 3}, and {sup 1}{Pi}{sub 1} states arising from the 10{sigma}{sup 2}11{sigma}{sup 2}5{pi}{sup 4}2{delta}{sup 3}6{pi}{sup 1} configuration have been observed in the 12thinsp700{endash}18thinsp100thinspcm{sup {minus}1} range, allowing all of these states to be placed on a common energy scale. The bond length increases as the molecule is electronically excited, from r{sub 0}=1.608thinsp{Angstrom} in the 2{delta}{sup 4}, Xthinsp{sup 1}{Sigma}{sup +} state, to 1.635 {Angstrom} in the 2{delta}{sup 3}12{sigma}{sup 1}, {sup 3}{Delta} state, to 1.66 {Angstrom} in the 2{delta}{sup 3}6{pi}{sup 1}, {sup 3}{Pi} and {sup 3}{Phi} states, to 1.667 {Angstrom} in the 2{delta}{sup 3}6{pi}{sup 1}, {sup 1}{Phi} and 1.678 {Angstrom} in the 2{delta}{sup 3}6{pi}{sup 1}, {sup 1}{Pi} state. A related decrease in vibrational frequency with electronic excitation is also observed. Hyperfine splitting is observed in the 2{delta}{sup 3}12{sigma}{sup 1}, {sup 3}{Delta}{sub 3} state for the {sup 99}Ru(I=5/2){sup 12}C and {sup 101}Ru(I=5/2){sup 12}C isotopic combinations. This is analyzed using known atomic hyperfine parameters to show that the 12{sigma} orbital is roughly 83{percent} 5s{sub Ru} in character, a result in good agreement with previous work on the related RhC and CoC molecules. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 663687
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 18 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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