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Citation: Shen Guan-Lin, Zhang Min, Dong Feng, Li Xue-Chu, Wang Xiu-Yan. Quenching and Rotational State-to-State Energy Transfer of NH₂(A²A₁,090,4₂₃)[J]. Acta Physico-Chimica Sinica, ;2001, 17(09): 840-844. doi: 10.3866/PKU.WHXB20010917 shu

Quenching and Rotational State-to-State Energy Transfer of NH₂(A²A₁,090,4₂₃)

1.
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian　116023

Received Date: 13 February 2001
Available Online: 15 September 2001

The study of quenching and rotational statetostate energy transfer of NH2(A1,090,423) with Ar,N2,O2, and NH3 was performed at single collisional conditions. The total quenching cross sections σQ for the four partners have been measured to be ≤0.17 nm2， 0.26 nm2，0.30 nm2 and 0.48 nm2, respectively. The relative cross sections of rotational statetostate energy transfer were obtained by measuring the dispersed fluorescent spectra. A collisioncomplex model was used to calculate the quenching cross sections and the theoretical and experimental values show the same trend. This indicates that long range attractive interactions play an important role in the quenching process. It was also found that the relative cross sections of rotational energy transfer decrease approximately with decreasing the reduced mass of the collisionpair. NH3 and O2 present the larger quenching cross sections and smaller cross sections of rotational energy transfer due to the larger dipole momentum and the electronic structure of openshell, respectively.
- Energy transfer of electronically excited state;Single collision;　Collision-complex model;NH₂ free radical
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Quenching and Rotational State-to-State Energy Transfer of NH₂(A²A₁,090,4₂₃)