Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions

被引：13

作者：

de Jongh, Tim ^{[1
,2
]}

Shuai, Quan ^{[1
,3
]}

Abma, Grite L. ^{[1
]}

Kuijpers, Stach ^{[1
]}

Besemer, Matthieu ^{[1
]}

van der Avoird, Ad ^{[1
]}

Groenenboom, Gerrit C. ^{[1
]}

van de Meerakker, Sebastiaan Y. T. ^{[1
]}

机构：

[1] Radboud Univ Nijmegen, Inst Mol & Mat, Nijmegen, Netherlands

[2] ENS Univ PSL, Sorbonne Univ, Coll France, CNRS,Lab Kastler Brossel, Paris, France

[3] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian, Peoples R China

来源：

NATURE CHEMISTRY | 2022年 / 14卷 / 05期

基金：

欧洲研究理事会;

关键词：

INELASTIC-COLLISIONS; NO-HE;

D O I：

10.1038/s41557-022-00896-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

One of the most important parameters in a collision is the 'miss distance' or impact parameter, which in quantum mechanics is described by quantized partial waves. Usually, the collision outcome is the result of unavoidable averaging over many partial waves. Here we present a study of low-energy NO-He collisions that enables us to probe how individual partial waves evolve during the collision. By tuning the collision energies to scattering resonances between 0.4 and 6 cm(-1), the initial conditions are characterized by a limited set of partial waves. By preparing NO in a rotationally excited state before the collision and by studying rotational de-excitation collisions, we were able to add one quantum of angular momentum to the system and trace how it evolves. Distinct fingerprints in the differential cross-sections yield a comprehensive picture of the partial wave dynamics during the scattering process. Exploiting the principle of detailed balance, we show that rotational de-excitation collisions probe time-reversed excitation processes with superior energy and angular resolution.

引用

页码：538 / +

页数：8

共 30 条

[1] State-to-state scattering of highly vibrationally excited NO at broadly tunable energies [J].