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- W2034355197 startingPage "496" @default.
- W2034355197 abstract "Six bands in the $ensuremath{lambda}3100$ system of C${mathrm{S}}_{2}$, photographed in absorption on a 30-foot grating spectrograph, have been analyzed and $B$ values are given for their initial and final states. The band structure is of the simple $mathrm{PR}$ branch type, all of the observed bands originating from $^{1}ensuremath{Sigma}^{+}_{u}ensuremath{-}^{1}ensuremath{Sigma}^{+}_{g}$ transitions. The bands at $ensuremath{lambda}3468$, $ensuremath{lambda}3501$, and $ensuremath{lambda}3535$ originate in the normal state, giving a value ${r}_{0}=1.548mathrm{A}$ for the normal carbon-sulphur separation. A partial vibrational analysis shows that for the bending vibration, $2ensuremath{nu}_{2}^{ensuremath{'}ensuremath{'}}=802$ ${mathrm{cm}}^{ensuremath{-}1}$. Two progressions, $v_{2}^{ensuremath{'}ensuremath{'}}=0$ and $v_{2}^{ensuremath{'}ensuremath{'}}=2$, indicate that $ensuremath{nu}_{2}^{ensuremath{'}}=270$ ${mathrm{cm}}^{ensuremath{-}1}$. Two bands, $ensuremath{lambda}3501$ and $ensuremath{lambda}3601$, have their common upper $^{1}ensuremath{Sigma}^{+}_{u}$ state perturbed by a $^{1}ensuremath{Pi}_{u}$ state. A perturbation analysis gives constants which are in good agreement with observation and in addition gives the $B$ value for the perturbing $^{1}ensuremath{Pi}_{u}$ state. Evidence is presented which indicates that the excited electronic state of C${mathrm{S}}_{2}$ is bent. It is shown that, even if the molecule is bent to 125ifmmode^circelsetextdegreefi{}, the $P$ and $R$ series may still be represented by a simple quadratic formula exactly as for a linear molecule, for $J$ values less than 25. The state nomenclature used ($^{1}ensuremath{Sigma}^{+}_{u}$, $^{1}ensuremath{Pi}_{u}$, etc.) is that corresponding to the vibronic (electronic-vibrational) states of a linear molecule." @default.
- W2034355197 created "2016-06-24" @default.
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- W2034355197 date "1941-10-01" @default.
- W2034355197 modified "2023-09-24" @default.
- W2034355197 title "A Rotational Analysis of Some CS2Bands in the Near Ultraviolet System" @default.
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- W2034355197 doi "https://doi.org/10.1103/physrev.60.496" @default.
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