title: Nascent rotational distribution for LiH(v=0-3,J) states from collisions with H2(E=4300 and 4800cm-1).
abstract: Rotationally state selective excitation of H2(v=1, J=1 or 3) was achieved by stimulated Raman pumping. The full state-resolved distribution of scattered LiH(v=0-3, J=0~13)molecules from collisions with excited H2(E=4300 and 4800cm-1) is reported. Nascent rotational and translational energy profiles for scattered LiH(v=0~3) molecules with J=0~13 were measured using high-resolution transient laser induced fluorescence(LIF). The product translational energy for individual J-states increases by 120% for a 13% increase in donor energy. The scattered LiH(v=0, J=0~13) molecules have a biexponential rotational distribution. Fitting the data with a two-component exponential model yields a low-energy distribution and a high-energy distribution. The rotational distribution is sensitive to donor energy. Rotational distributions of scatted LiH(v=1-3) molecules were also measured. The distribution yielded rotational temperatures at 690K for LiH/H2(E=4300cm-1) and 730K for LiH/H2(E=4800cm-1), respectively. The rate constants for appearance LiH(v=0-3,J) were determined.
authors.affiliation: School of Chemistry and Molecular Engineering, East China University of Sci.&Tech., Shanghai, 200237, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Shen
authors.affiliation: School of Physics, Xinjiang University, Urumqi, 830046, China.
authors.forename: Shuying
authors.initials: S
authors.lastname: Wang
authors.affiliation: School of Physics, Xinjiang University, Urumqi, 830046, China.
authors.forename: Kang
authors.initials: K
authors.lastname: Dai
authors.affiliation: School of Physics, Xinjiang University, Urumqi, 830046, China.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Shen
keywords: Collisional energy transfer; H(2)(E); LiH; Rotational and translational energy profiles; Stimulated Raman pumping; Transient fluorescence measurement