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ANOMALOUS BEHAVIOUR IN THE ROTATIONAL SPECTRUM OF THE $V_{8} = 2$ AND 3 VIBRATION FOR THE ${^{12}} CH_{3} {^{13}}C^{15}N$ MOLECULE IN THE FREQUENCY RANGE 17-95 gHz

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Title: ANOMALOUS BEHAVIOUR IN THE ROTATIONAL SPECTRUM OF THE $V_{8} = 2$ AND 3 VIBRATION FOR THE ${^{12}} CH_{3} {^{13}}C^{15}N$ MOLECULE IN THE FREQUENCY RANGE 17-95 gHz
Creators: Al-Share, M.; Tam, H.; Roberts, J. A.
Issue Date: 1989
Abstract: The methyl cyanide molecule was studied in the $v_{8} = 2$ and 3 vibrations, for rotational energy levels with $1 \leqslant J \leqslant 5$ to establish the trend in the energy level in the frequency range 17 to 95 gHz. Anomalous behaviour in the $^{12}CH_{3} {^{13}}C^{15}N$ rotational spectrum of the $V_{8} = 3$ vibration for the $(K=\pm 1) (\ell = \pm 1)$ components with large frequency departures, $=6(J+1) MHz$, from a standard model were investigated to determine what interactions were at play which had been ignorable in ${^{13}}CH_{3} {^{12}}C^{15}N$ molecule. The method of isotopic substitution enabled the molecular system to be ``tuned'' so that resonant interactions could be explored in more detail for each of the molecules. These large departures are explained using a basic molecular model in which accidentally strong resonances (ASR) are at play.
URI: http://hdl.handle.net/1811/17949
Other Identifiers: 1989-TC-5
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