Analysis of the ν3 band of NO2

The rotational structure of the ν₃ fundamental of ¹⁴N¹⁶O₂ has been recorded by employing a vacuum grating infrared spectrograph. The analysis has led to the assignment of over 500 R- and P-branch transitions in the spectral region 1562–1650 cm⁻¹. Molecular constants for the upper state, 001, have been presented. No Q-branch transitions were used in the evaluation of these constants. The presently obtained and the band center ν₀ = 1616.846 cm⁻¹ differ significantly from previous determinations. Spin splitting was observed but no information was extracted about upper state spin splitting parameters.     

Elastic scattering of15N on19F,19F on18O and19F on16O at low energies and elastic transfer

The reduced matrix elements for the ground state transitions to the first 2⁺, 3^? and 4⁺ states in¹⁴⁰Ce and¹⁴Ce were determined by DWBA analysis. In the giant resonance region of Ce, La and Pr three broad resonances at excitation energies of 9, 12 and 15 MeV have been found. They are interpreted asM1,E2 andE1 giant resonances. For Ce the total widths are (2.2±0.4) MeV (M1) and (2.8±0.3) MeV (E2) and the groundstate radiative widths (90±45) eV (M1), (100±30) eV (E2) and (5±1) · 10⁴ eV (E1).     

Infrared laser enhanced reactions: V→V and V→T energy transfer in the O3SiF4O2 system

Rapid V→V energy transfer between SiF₄ and O₃ has been observed following laser excitation of either O₃ or SiF₄. A CO₂ laser tuned to either the 9.6 μ P(30) or P(32) transitions was used to promote vibrational excitation in O₃ and SiF₄, respectively. In experiments employing the P(32) transition, the V→V transfer to O₃ and subsequent reaction of O₃² with NO were used to obtain the rate constant of V→T deactivation of SiF₄² by O₂.

Fractional modulation measurements of the chemiluminescence generated by the O₃ + NO reaction were used in experiments employing the P(30) transition to obtain a rate constant for the V→V energy transfer between O₃² and SiF₄.