Difference-frequency laser spectroscopy of the ν4 fundamental band of NH3D+
Keyword(s):
The high-resolution spectrum of the ν4 fundamental band of NH3D+ has been observed in absorption in a hollow-cathode discharge with a difference-frequency laser system. The molecular constants have been determined through a least squares fit of the observed transition wave numbers to an effective Hamiltonian. The equilibrium rotational constant is estimated to be 4.438 ± 0.027 cm−1, from which the equilibrium N—H bond length is calculated to be 1.021 ± 0.003 Å. Some low-lying rotational transition frequencies in the ground state are calculated to assist in the search for pure rotational transitions in the laboratory and in interstellar space.
1976 ◽
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pp. 97
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pp. 654-665
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pp. 3595-3595
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pp. 3721-3728
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pp. 5918-5923
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pp. 141-146
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