Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2021
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866929307713011712 |
|---|---|
| author | de Jongh, Tim Shuai, Quan Abma, Grite L. Kuijpers, Stach Besemer, Matthieu van der Avoird, Ad Groenenboom, Gerrit C. van de Meerakker, Sebastiaan Y. T. |
| author_facet | de Jongh, Tim Shuai, Quan Abma, Grite L. Kuijpers, Stach Besemer, Matthieu van der Avoird, Ad Groenenboom, Gerrit C. van de Meerakker, Sebastiaan Y. T. |
| contents | 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\textendash 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2112_07446 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions de Jongh, Tim Shuai, Quan Abma, Grite L. Kuijpers, Stach Besemer, Matthieu van der Avoird, Ad Groenenboom, Gerrit C. van de Meerakker, Sebastiaan Y. T. Atomic Physics Chemical Physics 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\textendash 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. |
| title | Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions |
| topic | Atomic Physics Chemical Physics |
| url | https://arxiv.org/abs/2112.07446 |