The Δk = ±2 perturbation-allowed ν4 band and inversion-rotation energy levels of 15NH3 |
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| Authors: | ? Urban Romola D&#x;Cunha K Narahari Rao D Papou?ek |
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| Institution: | Department of Physics, The Ohio State University, Columbus, Ohio 43210 USA;The J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, Prague, Czechoslovakia |
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| Abstract: | More than 800 Δk = ±2 and 60 Δk = ±3 forbidden transitions to the ν4 and 2ν2 vibrational levels, respectively, have been assigned in the Fourier transform spectra of 15NH3, recorded with a pathlength of 96 m. Combination differences derived from these transitions provide information on the spacing between the ground state energy levels with different rotational quantum numbers K in the interval from 0 to 16. These data along with wavenumbers of all the available allowed transitions pertaining to the ground and ν2 states have been subjected to a simultaneous least-squares analysis using two different parametrization models to obtain precise values of the inversion-rotation energy levels. |
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