Anisotropic dynamics of resonant scattering between a pair of cold aligned diatoms

Anisotropic dynamics of resonant scattering between a pair of cold aligned diatoms
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一对冷排列硅藻之间共振散射的各向异性动力学

DOI:
10.1038/s41557-022-00926-z
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发表时间:
2022
期刊:
影响因子:
21.8
通讯作者:
Zare, Richard N.
Zare, Richard N.
中科院分区:
化学1区
文献类型:
--
作者:
Zhou, Haowen;Perreault, William E.;Mukherjee, Nandini;Zare, Richard N.

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在存在部分波共振的情况下,一对排列的分子之间的碰撞动力学提供了对化学反应重要的远距离各向异性力的最敏感的探针。在这里,我们控制碰撞温度和几何形状来探测一对光学状态制备的d2分子的冷(1-3 K)旋转非弹性散射动力学。通过将激光状态制备和检测的门控作用与分子束的速度色散相结合来控制碰撞温度。当两个分子的键轴与碰撞速度平行排列时,随着碰撞能量>2.1 K的去除,散射率下降了3.5倍,表明存在几何相关的共振。对测得的角分布进行的部分波分析支持在thel= 2入轨道的离心障壁内存在形状共振。我们的实验说明了控制共振散射动力学的四极-四极相互作用的强各向异性。
The collision dynamics between a pair of aligned molecules in the presence of a partial-wave resonance provide the most sensitive probe of the long-range anisotropic forces important to chemical reactions. Here we control the collision temperature and geometry to probe the dynamics of cold (1–3 K) rotationally inelastic scattering of a pair of optically state-prepared D2molecules. The collision temperature is manipulated by combining the gating action of laser state preparation and detection with the velocity dispersion of the molecular beam. When the bond axes of both molecules are aligned parallel to the collision velocity, the scattering rate drops by a factor of 3.5 as collision energies >2.1 K are removed, suggesting a geometry-dependent resonance. Partial-wave analysis of the measured angular distribution supports a shape resonance within the centrifugal barrier of thel= 2 incoming orbital. Our experiment illustrates the strong anisotropy of the quadrupole–quadrupole interaction that controls the dynamics of resonant scattering.
DOI: 10.1063/1.3599711
发表时间: 2011-07
期刊: The Journal of chemical physics
影响因子: --
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