Triplet and singlet state-resolved molecular dynamics in mutual neutralisation reactions of H2+ with H−

Triplet and singlet state-resolved molecular dynamics in mutual neutralisation reactions of H2+ with H− | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Triplet and singlet state-resolved molecular dynamics in mutual neutralisation reactions of H2+ with H− Richard Thomas, Mathias Poline, Arnaud Dochain, Stefan Rosén, and 6 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9439786/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract By combining three-dimensional imaging with merged-beam techniques, the quantum-states distributions and reaction dynamics in the low-collision-energy mutual neutralisation reaction of H+ 2 with H− were determined for the first time. Use of the mixed isotopologue HD+ in a cryogenic double ion-beam storage ring allowed to study the effect of rovibrational cooling on the reaction, and revealed competition between triplet-state driven molecular fragmentation (≈ 72%) and singlet-state stabilization (≈ 28%), with all reactions producing fluorescence. A new theoretical approach is presented, which yields results in good agreement with the experiment, and thereby provides new rate coefficients and a predictive emission spectrum for the reaction. These results are expected to be crucial for the modelling of hydrogen plasma in, for examples, ion sources, plasma torches, fusion experiments and reactors. Physical sciences/Physics/Atomic and molecular physics/Atomic and molecular collision processes Physical sciences/Physics/Chemical physics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files H2pHmMNSI.pdf Supplementary Information: Triplet and singlet state-resolved molecular dynamics in mutual neutralisation reactions of H 2 + with H − Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9439786","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":631913542,"identity":"01ac2a67-f1b6-4582-9941-009c0d05cc3e","order_by":0,"name":"Richard 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