“Forbidden” millimeter-wave transitions in arsine |
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Authors: | David A Helms Walter Gordy |
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Institution: | Department of Physics, Duke University, Durham, North Carolina 27706 USA |
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Abstract: | A millimeter-wave spectrometer having a sensitivity of 4 × 10?10 cm?1 in the 2-mm region has been used for observation of the “forbidden” transitions J → J, K = ±4 → ±1 and J → J, K = ±5 → ±2 in AsH3. A comprehensive computer analysis was made of the frequencies measured in this work together with available microwave frequencies of other transitions. This analysis provides accurate values of the rotational constants, nuclear quadrupole couplings, and effective structural parameters of the molecule. The spectral constants B0 and C0 (in MHz) are 112 470.597 and 104 884.665, respectively. |
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