High Precision Cavity Ring Down Spectroscopy of 6ν3 Overtone Band of 14N216O near 775 nm

Transitions of the 6 nu(3) overtone band of (N2O)-N-14-O-16 near 775 nm have been studied by continuous-wave cavity ring-down spectroscopy. Line positions and intensities were derived from a fit of the line shape using a hard-collisional pro file. The line positions determined with absolute accuracy of 5 x 10(-4) cm(-1) allowed us to reveal finer ro-vibrational couplings taking place after J > 14 except a strong anharmonic interaction identified by the effective Hamiltonian model. The absolute line intensities have also been retrieved with an estimated accuracy of 2% for a majority of the unblended lines. A new set of ro-vibrational and dipole moment parameters were derived from the experimental values. A comparison between the line positions and intensities of the 6 nu(3) band obtained in this work and those from previous studies is given.