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A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam

Charlotte Jansen Orcid Logo, Ludo B. F. Juurlink Orcid Logo, Richard van Lent Orcid Logo, Helen Chadwick Orcid Logo

Review of Scientific Instruments, Volume: 95, Issue: 5, Start page: 055111

Swansea University Author: Helen Chadwick Orcid Logo

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DOI (Published version): 10.1063/5.0203641

Abstract

State-resolved experiments can provide fundamental insight into the mechanisms behind chemical reactions. Here, we describe our methods for characterizing state-resolved experiments probing the outcome of the collision between CO2 molecules and surfaces. We create a molecular beam from a supersonic...

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Published in: Review of Scientific Instruments
ISSN: 0034-6748 1089-7623
Published: AIP Publishing 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa66470
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first_indexed 2024-05-20T07:53:37Z
last_indexed 2024-05-20T07:53:37Z
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spelling v2 66470 2024-05-20 A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam 8ff1942a68a875f00d473d51aa4947a1 0000-0003-4119-6903 Helen Chadwick Helen Chadwick true false 2024-05-20 EAAS State-resolved experiments can provide fundamental insight into the mechanisms behind chemical reactions. Here, we describe our methods for characterizing state-resolved experiments probing the outcome of the collision between CO2 molecules and surfaces. We create a molecular beam from a supersonic expansion that passes through an ultra-high vacuum system. The CO2 is vibrationally excited by a continuous wave infrared (IR) laser using rapid adiabatic passage. We attenuate the fractional excitation using a CO2 absorption cell in the IR beam path. We combine Monte Carlo simulations and molecular beam energy measurements to find the initial rotational state distribution of the molecular beam. We find that our pure CO2 beam from a 300 K source has a rotational temperature of ∼26 K. Journal Article Review of Scientific Instruments 95 5 055111 AIP Publishing 0034-6748 1089-7623 17 5 2024 2024-05-17 10.1063/5.0203641 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University Another institution paid the OA fee This work was part of the research program Materials for Sustainability with Project No. 739.017.008, which is (partly) financed by the Dutch Research Council (NWO). 2024-06-17T14:44:43.5306903 2024-05-20T08:47:09.5755942 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Charlotte Jansen 0000-0002-3590-4427 1 Ludo B. F. Juurlink 0000-0002-5373-9859 2 Richard van Lent 0000-0002-4106-9595 3 Helen Chadwick 0000-0003-4119-6903 4 66470__30660__798e8e5d7b524f05af448911b2df7fb5.pdf 66470.VoR.pdf 2024-06-17T14:43:41.2650814 Output 5470971 application/pdf Version of Record true © 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercialNoDerivs 4.0 International (CC BY-NC-ND) license. true eng https://creativecommons.org/licenses/by-nc-nd/4.0/).
title A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
spellingShingle A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
Helen Chadwick
title_short A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
title_full A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
title_fullStr A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
title_full_unstemmed A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
title_sort A state-selected continuous wave laser excitation method for determining CO2’s rotational state distribution in a supersonic molecular beam
author_id_str_mv 8ff1942a68a875f00d473d51aa4947a1
author_id_fullname_str_mv 8ff1942a68a875f00d473d51aa4947a1_***_Helen Chadwick
author Helen Chadwick
author2 Charlotte Jansen
Ludo B. F. Juurlink
Richard van Lent
Helen Chadwick
format Journal article
container_title Review of Scientific Instruments
container_volume 95
container_issue 5
container_start_page 055111
publishDate 2024
institution Swansea University
issn 0034-6748
1089-7623
doi_str_mv 10.1063/5.0203641
publisher AIP Publishing
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
document_store_str 1
active_str 0
description State-resolved experiments can provide fundamental insight into the mechanisms behind chemical reactions. Here, we describe our methods for characterizing state-resolved experiments probing the outcome of the collision between CO2 molecules and surfaces. We create a molecular beam from a supersonic expansion that passes through an ultra-high vacuum system. The CO2 is vibrationally excited by a continuous wave infrared (IR) laser using rapid adiabatic passage. We attenuate the fractional excitation using a CO2 absorption cell in the IR beam path. We combine Monte Carlo simulations and molecular beam energy measurements to find the initial rotational state distribution of the molecular beam. We find that our pure CO2 beam from a 300 K source has a rotational temperature of ∼26 K.
published_date 2024-05-17T14:44:42Z
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score 11.013082

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