The low frequency microwave spectra of ¹⁴NH₃ and carbonyl sulphide

Sinha, Bakshi Vidyanand (1978) The low frequency microwave spectra of ¹⁴NH₃ and carbonyl sulphide. Masters thesis, Memorial University of Newfoundland.

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Abstract

Fifteen new ground state inversion lines of ¹⁴NH₃ were observed at 80° to 90°C, accurately measured and assigned. The electric dipole moment computed from the Stark shifts is 1.472 ± 0.002 D, which compares well with the value 1.475 ± 0.0006 D reported recently by Fujoi Shimizu. Corrections were applied to K = 3 and K = 6 lines. -- Nine 0→1 rotational transitions of Carbonyl Sulphide, including one Fermi pair and one triplet due to quadrupole interaction of ³³S nucleus were observed, accurately measured and assigned. The relative electric dipole moments of OCS in the (10⁰O) and (02⁰O) states and those of ¹⁸OCS, O¹³CS, OC³³S and OC³⁴S in the ground state were computed from the Stark shifts. The relative electric dipole moments for O¹³CS and OC³⁴S are respectively 1.0057 and 1.0155. -- A new technique to distinguish and shift the reflection resonances within the guide from the absorption lines of the gas was developed and successfully employed.

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