Atomic Alignment Effect on Reactivity and on Product Alignment in the Energy-Transfer Reaction of Oriented Ar (3P2, 4s [3/2]2, MJ = 2) + Kr (4p6,1S0) → Ar (3p6, 1S0) + Kr (5p [3/2]2)
Atomic Alignment Effect on Reactivity and on Product Alignment in the Energy-Transfer Reaction of Oriented Ar (3P2, 4s [3/2]2, MJ = 2) + Kr (4p6,1S0) → Ar (3p6, 1S0) + Kr (5p [3/2]2)
复制标题
取向 Ar (3P2, 4s [3/2]2, MJ = 2) + Kr (4p6,1S0) → Ar (3p6, 1S0) + Kr ( 5p [3/2]2)
DOI：
10.1021/jp509989x
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发表时间：
2015
期刊：
影响因子：
2.9
通讯作者：
H. Ohoyama
中科院分区：
文献类型：
--
作者：
Yuki Usami;Kentaro Imamura;Tomoki Akai;Dock-Chil Che;Hiroshi Ohoyama;Hikaru Kobayashi;Takuya Matsumoto;H. Ohoyama
用定向Ar(3P2，4s[3/2]2，Mj=2)束流，在碰撞能量为∼0.09 eV时，研究了Ar(3P2，4s[3/2]2)+Kr能量转移反应中Kr(5p[3/2]2)形成的位阻效应。当Ar(3P2)的角动量(JAR)垂直于相对速度矢量(Vr)时，Kr(5p[3/2]2)的发射强度约增加2倍。此外，当JAr2垂直于VR排列时，Kr(5p[3/2]2)发射平行于VR(I∥/I⊥∼1.2)是高度极化的。观察到的偏振矩表明，Ar(3P2)的未成对的Ar(3p)轨道对VR，(Σ(|L‘|=0)，Π(|L’|=1))，控制能量转移几率(σΠ∥：σΣ∥：σΠ⊥：σΣ⊥=0.49：1.33：0.55：1.23)以及Kr(5p[3/2]2)与Vr的Kr(5p)轨道排列：Ar(3p)轨道的Σ组态导致Kr(5p)轨道与Vr平行排列(Σ组态)，反之，Ar(3p)轨道的Π组态导致Kr(5p)轨道垂直排列(Π组态)。此外，在阈值降至0.03 eV后，随着碰撞能的增加，Kr(5p)轨道的排列选择性由垂直变为平行。
Steric effect for the formation of Kr (5p [3/2]2) in the energy transfer reaction of Ar (3P2, 4s [3/2]2) + Kr has been studied by using an oriented Ar (3P2, 4s [3/2]2,MJ= 2) beam at a collision energy of ∼0.09 eV. The emission intensity of Kr (5p [3/2]2) is ca. 2 times enhanced when the angular momentum (JAr) of Ar (3P2) is aligned perpendicular to the relative velocity vector (vR). In addition, the Kr (5p [3/2]2) emission is highly polarized parallel tovR(I∥/I⊥∼ 1.2) whenJAris aligned perpendicular tovR. The observed polarization moments indicate that the alignment of the unpaired Ar (3p) orbital of Ar (3P2) tovR, (Σ (|L′| = 0), Π (|L′| = 1)), dominates the energy transfer probability (σΠ∥: σΣ∥: σΠ⊥: σΣ⊥= 0.49:1.33:0.55:1.23) and also the alignment of the Kr (5p) orbital of Kr (5p [3/2]2) tovR: the Σ-configuration of the Ar (3p) orbital leads to the parallel alignment (Σ-configuration) of the Kr(5p) orbital to vR, conversely, the Π-configuration of Ar (3p) orbital leads to the perpendicular alignment (Π-configuration) of the Kr(5p) orbital. In addition, the selectivity of the alignment of the Kr (5p) orbital turns out to vary from perpendicular to parallel as the collision energy increases after a threshold down to 0.03 eV.