CHEMILUMINESCENT REACTION DYNAMICS OF Sn+N2O IN BEAM-GAS

The chemiluminescence reaction of tia with N2O and O2 have been investigated in a beam-gas apparatus under the presure range of 10-4-10-2 torr. The chemiluminescent spectra recorded for both reactions under single-collision conditions have been recognized as thhe emission of b(3 Pi()0) and b'2(Pi)(1) state to the ground state of SnO produced in the reaction. For the reaction of Sn withh N2O, the emission from a(3)Sigma-X-1 Sigma transition obviously becomes enhanced with increasing of background gas pressure. The relative population of a(3)Sigma state of v-0 and v=1 as well as thhe emission intensity of a(3)Sigma and b(1)Pi(1) states to X'Sigma state of SnO have been measure also. The total cross section of collision is about 32 angstrom(2). In analyzing the experimental results, it is found that the production of electronically excited SnO molecule from the reaction fo Sn with N2O may proceed with the following mechanism: