The Study on State-to-State Rotational Energy Transfer in NH₂（òA₁） by Dispersion Fluorescence Spectrum

Single rotational state 3₀₃ of NH₂(òA₁)Σ（0,9,0） is produced by laser excitation of NH₂ (\tilde X^2B₁) at molecular beam condition. The relative cross sections of rotational energy transfer between Σ（0,9,0,） 3₀₃ and Σ（0,9,0） 5₀₅, 1₀₁, Δ（0,9,0） 6₂₅, 5₂₃, 4₂₃, 3₂₁, 2₂₁ have been obtained. The results show that the probabilities of rotational energy tranfer for ΔN＞2 are very low, and the smaller the ΔN values, the larger the energy transfer cross sections. The energy transfer occurs preferentially at the same vibronic state and the downward transition prabadility is larger than one for the upward transition. The symmetry of the rotational energy levels is conserved during the collision process. The results reported here are the newest obtained at single collision condition.