以交叉分子束及时间切片离子速度成像法研究产物成对相关讯息 |
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作者单位: | 中央研究院原子与分子科学研究所,台北市106;中央研究院原子与分子科学研究所,台北市106;中央研究院原子与分子科学研究所,台北市106;中央研究院原子与分子科学研究所,台北市106 |
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基金项目: | The authors acknowledge the supports from National Science Council of Taiwan |
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摘 要: |
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关 键 词: | 产物成对相关性 离子速度成像 密度-通量转换 反应共振 |
Product Pair-correlation by Crossed Molecular Beam and Time-sliced Ion Velocity Imaging Methods |
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Authors: | Lin Jim Jr-Min Zhou Jingang Shiu Wei-Chen Liu Kopin |
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Abstract: | A novel experimental technique has been developed to measure the attributes of product pair correlation of bimolecular reactions under the crossed molecular beam condition. The first system that we picked is F + CD4/CHD3 / CH4 reactions. By combining a crossed molecular beam method with a time-sliced ion velocity imaging technique,the product state-resolved pair-correlated differential cross sections were revealed directly from the measurements. Several facets of the product pair correlation have been explored. The dependence on the collisional energy has been elucidated. The pair-correlated angular distributions show strong dependences on the HF/DF vibrational quantum numbers,and weaker yet not negligible dependences on the methyl radical vibrational quantum numbers. For the F + CH4 reaction at collisional energies close to the reaction threshold,the first experimental evidences of a reactive resonance in a polyatomic reaction were discovered. The product pair-correlated information helps us to unravel the complexity of polyatomic reactions and offers the important link between A + BC type of reactions and more general polyatomic reactions. |
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Keywords: | Product pair correlation,Ion velocity imaging,Density-to-flux transformation,Reactive resonance |
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