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MO: Molekülphysik

MO 7: Poster: Cluster, Stoßprozesse

MO 7.28: Poster

Tuesday, March 17, 1998, 16:00–18:00, PF

Reaction Dynamics of Sr(³P_J)+RI→SrI^*+R(R=CH₃,C₂H₅): Rotational Alignment, Electronic State Branching Ratio and Vibrational State Population of SrI^* — •Victor Wei-Keh WU¹, Ming-Liang WANG², Ji-Ping ZHAN², Ke-Li HAN², Guo-Zhong HE², and Nan-Quan LOU² — ¹Victor Basic Research Laboratory e. V., Bielefeld, FRG. Telefax:0049-(0)521-160395, http://www.uni-bielefeld.de/ fkure — ²SKLMRD, Dalian Institute of Chemical Physics, CAS. Dalian, 116023 P.R.China

Sr(³P_J) + RI → SrI (A²P_1/2,3/2, B²Σ⁺) + R (R = CH₃,C₂H₅) reactions have been studied by measuring their chemiluminescences under beam-gas conditions. The relative E_rel was approx. 0.077 eV, at which the rotational alignments R_obs of SrI^* of B state were obtained as 0.26 ± 0.02 and 0.11 ± 0.02; the calculated <P₂(j′·k)> are -0.48 ± 0.02 and -0.19 ± 0.02 for R = CH₃ and C₂H₅ respectively. Because of the pool resolution for the data of A state, the following values for A state are only for eventual reference: the experimental values are -0.18 ± 0.02 and -0.10 ± 0.02, the calculated <P₂(j′·k)> are -0.23 ± 0.02 and -0.12 ± 0.02 for R = CH₃ and C₂H₅ respectively. The electronic state branching ratios and product vibrational state populations have been also estimated by simulating the chemilumescences of SrI(A, B). ^*Wu acknowledges the sponsorships of VBR(75%), DFG., and SKLMRD. Ref. Chem. Phys. Lett., in press (1997)