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The internal energy distributions of the nascent BaBr products formed in the reactions ofBa+BrR(R=CH_3,C_2H_5,C_3H_7,C_4H_9,C_5H_(11)) under the single collision condition have been first studied bylaser-induced fluorescence method.With computer simulations of the experimental spectra,we obtained thevibrational distributions of the BaBr products,and found that the vibrational excitation and reaction cross-section increase with the number of the carbon atoms in the alkyl radical R.The quasitriatomic LEPS poten-tial of the Ba+CH_3 reaction has been deduced reversely from the experimental results.The dynamics of thereactions Ba+BrR have been studied by the classical trajectory calculations based on the model LEPS poten-tials.It is concluded that the mass factor and the C-Br bond strength are the major factors affecting the rela-tionship between vibrational excitation and reaction cross-section with the number of the carbon atoms in thealkyl radical R.Furthermore,we obtained all the LEPS potentials of the reactive systems Ba+C_mH_(2m+1) andconfirmed its reliability with ab initio calculations.
The internal energy distributions of the nascent BaBr products formed in the reactions of Ba + BrR (R = CH_3, C_2H_5, C_3H_7, C_4H_9, C_5H_ (11)) under the single collision condition have been first studied by laser-induced fluorescence method. of the experimental spectra, we obtained the vibrational distributions of the BaBr products, and found that the vibrational excitation and reaction cross-section increase with the number of the carbon atoms in the alkyl radical R. quasitriatomic LEPS poten- tial of the Ba + CH_3 reaction has been deduced reversely from the experimental results. The dynamics of thereactions Ba + BrR have been studied by the classical trajectory calculations based on the model LEPS poten- tals. It is concluded that the mass factor and the C-Br bond strength are the major factors affecting the rela-tionship between vibrational excitation and reaction cross-section with the number of the carbon atoms in the alkyl radical R.Furthermore, we obtained all the LEPS p otentials of the reactive systems Ba + C_mH_ (2m + 1) andconfirmed its reliability with ab initio calculations.