title: Study of the transient "free" OH radical generated in H2O-H2O2mixtures by stimulated Raman scattering.
abstract: Forward and backward stimulated Raman scattering (SRS) were studied in the H2O2-H2O mixtures by a strong excitation laser with 532nm. Only the backward SRS (BSRS) of the H2O2-H2O system shows an unexpected SRS shoulder peak at around 3600cm-1, which is similar to the characteristic peak of "free" OH radical. The generation of the "free" OH radical is mainly attributed to the dissociation of hydrogen peroxide (HP) molecules. Simultaneously, the ionization of HP-water clusters generates a part of "free" OH radical under the Laser-induced breakdown (LIB). The interaction of water and HP is also discussed.
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Fangfang
authors.initials: F
authors.lastname: Li
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Shenghan
authors.initials: S
authors.lastname: Wang
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Tianyu
authors.initials: T
authors.lastname: Li
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.
authors.forename: Chenglin
authors.initials: C
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China. Electronic address: zlli@jlu.edu.cn.
authors.forename: Zhanlong
authors.initials: Z
authors.lastname: Li
authors.affiliation: Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China. Electronic address: zwmen@jlu.edu.cn.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Men
keywords: H(2)O-H(2)O(2); Laser-induced breakdown; Stimulated Raman scattering; “Free” OH radical