POSITIONS AND INTENSITIES IN THE 3-NU(2)/NU(2)+NU(4) VIBRATIONAL SYSTEM OF (NH3)-N-14 NEAR 4 MU-M

We report experimental line positions and intensities of the 3 nu(2) and nu(2) + nu(4) bands of (NH3)-N-14 obtained from 0.011 cm(-1) unapodized resolution spectra recorded with the Fourier transform spectrometer at Kitt Peak National Observatory, A total of 1366 lines with J' less than or equal to 13 have been assigned from which 1213 line positions with J' less than or equal to 12 are fitted. using an effective rotation-inversion Hamiltonian to achieve a rms of 0.0069 cm(-1); 726 intensity measurements are modeled to 12 terms of dipole moment expansion to +/-6%. The band strengths of 3 nu(2) (s - a) at 2384.15 cm(-1), of 3 nu(2) (a - s) at 2895.52 cm(-1), of nu(2) + nu(4) (s - s) at 2540.53 cm(-1), and of nu(2) + nu(4) (a - a) at 2586.13 cm(-1) are estimated to be 0.61(3), 0.244(7), 0.186(3) and 0.174(25) cm(-2) atm(-1), respectively, at 296 K. In addition to the 3 nu(2)/nu(2) + nu(4) system, there are a number of strong lines that are thought to belong to hot bands. A prediction of the line positions and intensities has been generated for all lines with intensities greater than 0.1 X 10(-6) cm(-2) atm(-1) at 296 K and submitted to the HITRAN database. Implications about the suitability of the Hamiltonian used are explored, given that the experimental accuracy is about 16 times better than has been achieved by the fit. (C) 1995 Academic Press, Inc.