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Infrared spectroscopy of15ND3: The ν2and ν4bending fundamental bands

Authors
Journal
Journal of Quantitative Spectroscopy and Radiative Transfer
0022-4073
Publisher
Elsevier
Volume
119
Identifiers
DOI: 10.1016/j.jqsrt.2013.01.019
Keywords
  • Ammonia
  • 15Nd3
  • High Resolution Infrared Spectra
  • Bending Vibrations
  • Rovibration Analysis
  • Fully Deuterated Ammonia
Disciplines
  • Mathematics
  • Physics

Abstract

Abstract The infrared spectrum of the ammonia isotopologue 15ND3 has been investigated by high resolution Fourier transform spectroscopy in the region from 450 to 1600cm−1. In total, 2217 transitions involving the (s) and (a) inversion–rotation–vibration levels have been identified and assigned to the ν2 and ν4 bending fundamentals. The assigned transitions have been fitted simultaneously using an inversion–rotation–vibration effective Hamiltonian which includes all symmetry allowed interactions between and within the excited state levels. The adopted model has been successful in rationalizing the complicated energy level pattern. Accurate values for the vibration and rotation spectroscopic constants, including 11 interaction coefficients, have been obtained for both inversion levels of the v2=1 and v4=1 states. The standard deviation of the fit, 0.00071cm−1, is about two times the estimated measurement precision.

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