Circular dichroism in photoelectron images from aligned nitric oxide molecules
We have used velocity map photoelectron imaging to study circular dichroism of the photoelectron angular distributions (PADs) of nitric oxide following two-color resonance-enhanced two-photon ionization via selected rotational levels of the A ²∑⁺ , v' = 0 state. By using a circularly polarized...
| Main Authors: | , , |
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| Format: | Article |
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American Institute of Physics
2017
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| Online Access: | https://eprints.nottingham.ac.uk/42521/ |
| _version_ | 1848796506371391488 |
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| author | Sen, Ananya Pratt, S.T. Reid, Katharine L. |
| author_facet | Sen, Ananya Pratt, S.T. Reid, Katharine L. |
| author_sort | Sen, Ananya |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We have used velocity map photoelectron imaging to study circular dichroism of the photoelectron angular distributions (PADs) of nitric oxide following two-color resonance-enhanced two-photon ionization via selected rotational levels of the A ²∑⁺ , v' = 0 state. By using a circularly polarized pump beam and a counter-propagating, circularly polarized probe beam, cylindrical symmetry is preserved in the ionization process, and the images can be reconstructed using standard algorithms. The VMI set up enables individual ion rotational states to be resolved with excellent collection efficiency, rendering the measurements considerably simpler to perform than previous measurements conducted with a conventional photoelectron spectrometer. The results demonstrate that circular dichroism is observed even when cylindrical symmetry is maintained, and serve as a reminder that dichroism is a general feature of the multiphoton ionization of atoms and molecules. The observed PADs are in good agreement with calculations based on parameters extracted from previous experimental results obtained by using a time-of-flight electron spectrometer. |
| first_indexed | 2025-11-14T19:49:04Z |
| format | Article |
| id | nottingham-42521 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:49:04Z |
| publishDate | 2017 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-425212020-05-04T18:44:42Z https://eprints.nottingham.ac.uk/42521/ Circular dichroism in photoelectron images from aligned nitric oxide molecules Sen, Ananya Pratt, S.T. Reid, Katharine L. We have used velocity map photoelectron imaging to study circular dichroism of the photoelectron angular distributions (PADs) of nitric oxide following two-color resonance-enhanced two-photon ionization via selected rotational levels of the A ²∑⁺ , v' = 0 state. By using a circularly polarized pump beam and a counter-propagating, circularly polarized probe beam, cylindrical symmetry is preserved in the ionization process, and the images can be reconstructed using standard algorithms. The VMI set up enables individual ion rotational states to be resolved with excellent collection efficiency, rendering the measurements considerably simpler to perform than previous measurements conducted with a conventional photoelectron spectrometer. The results demonstrate that circular dichroism is observed even when cylindrical symmetry is maintained, and serve as a reminder that dichroism is a general feature of the multiphoton ionization of atoms and molecules. The observed PADs are in good agreement with calculations based on parameters extracted from previous experimental results obtained by using a time-of-flight electron spectrometer. American Institute of Physics 2017-05-03 Article PeerReviewed Sen, Ananya, Pratt, S.T. and Reid, Katharine L. (2017) Circular dichroism in photoelectron images from aligned nitric oxide molecules. Journal of Chemical Physics, 147 . 013927/1-013927/10. ISSN 1089-7690 http://aip.scitation.org/doi/full/10.1063/1.4982218 doi:10.1063/1.4982218 doi:10.1063/1.4982218 |
| spellingShingle | Sen, Ananya Pratt, S.T. Reid, Katharine L. Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title | Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title_full | Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title_fullStr | Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title_full_unstemmed | Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title_short | Circular dichroism in photoelectron images from aligned nitric oxide molecules |
| title_sort | circular dichroism in photoelectron images from aligned nitric oxide molecules |
| url | https://eprints.nottingham.ac.uk/42521/ https://eprints.nottingham.ac.uk/42521/ https://eprints.nottingham.ac.uk/42521/ |