State‐selected reactive scattering. I. H+2+H2→H+3+H
State‐selected reactive scattering. I. H+2+H2→H+3+H
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I. H+2+H2→H+3+H。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
R. B. Cohen
中科院分区：
文献类型：
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作者：
J. Pollard;L. Johnson;D. A. Lichtin;R. B. Cohen
反应H+2+H2→H+3+H的横截面，散射角和反冲能的微分，在分子束实验中测量。碰撞能量为1.5、2.3、3.5和5.3 eV。共振增强四光子电离制备H+2在选定的振动态分布，允许反应物的能量对产品的角和能量分布的影响进行系统的探索。角度数据是根据H+3形成和碰撞诱导解离之间的竞争来解释的。名义原子转移（AT）和质子转移（PT）过程分别与前向和后向散射H+3。反应物能量对H+2+H2中AT和PT截面的影响与以前对D+2+H2和H+2+D2的观察进行了比较。可用能量的分数出现H+3+H反冲的范围从26%到39%，这取决于反应物的条件。以前的表面跳跃轨迹计算成功地预测了大多数观察到的趋势。证据...
Cross sections for the reaction H+2+H2→H+3+H, differential in scattering angle and recoil energy, are measured in a molecular‐beam experiment at c.m. collision energies of 1.5, 2.3, 3.5, and 5.3 eV. Resonantly enhanced four‐photon ionization prepares H+2 in selected vibrational‐state distributions, allowing a systematic exploration of the effects of reactant energy on the product angular and energy distributions. Angular data are interpreted on the basis of competition between H+3 formation and collision‐induced dissociation. The nominal atom‐transfer (AT) and proton‐transfer (PT) processes are identified respectively with forward and backward scattered H+3. Effects of reactant energy on AT and PT cross sections in H+2+H2 are compared with previous observations on D+2+H2 and H+2+D2. The fraction of the available energy appearing as H+3+H recoil ranges from 26% to 39% depending on reactant conditions. Previous surface‐hopping trajectory calculations successfully predict most of the observed trends. Evidenc...