Výsledky vyhledávání - "Dave Townsend"

Velocity-map imaging of photoelectron circular dichroism in non-volatile molecules using a laser-based desorption source

Autor: Chris Sparling, Stuart W. Crane, Lewis Ireland, Ross Anderson, Omair Ghafur, Jason B. Greenwood, Dave Townsend

Publikováno v: Sparling, C, Crane, S W, Ireland, L, Anderson, R, Ghafur, O, Greenwood, J B & Townsend, D 2023, ' Velocity-map imaging of photoelectron circular dichroism in non-volatile molecules using a laser-based desorption source ', Physical Chemistry Chemical Physics, vol. 25, no. 8, pp. 6009-6015 . https://doi.org/10.1039/d2cp05880d

We present an initial demonstration of a velocity-map imaging (VMI) experiment using a back-irradiation laser-based desorption source directly integrated into the electrode assembly. This has the potential to greatly expand the utility of the popular

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c41a38869b74038000bbe9111420bca
https://pure.qub.ac.uk/en/publications/50b03d2d-1aa2-48ac-a159-035a249ae189

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Ultraviolet Excitation Dynamics of Nitrobenzenes

Autor: Stuart W. Crane, Lisa Saalbach, Nikoleta Kotsina, Dave Townsend, Martin J. Paterson

Publikováno v: The Journal of Physical Chemistry A. 125:7174-7184

Time-resolved photoelectron imaging was used to investigate nonadiabatic processes operating in the excited electronic states of nitrobenzene and three methyl-substituted derivatives: 3,5-, 2,6-, and 2,4-dimethylnitrobenzene. The primary goal was eva

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bc1549c748faa50da5f9ac7e10c5bdf
https://doi.org/10.1021/acs.jpca.1c04893

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MAPPING EXTENDED REACTION COORDINATES IN PHOTOCHEMICAL DYNAMICS

Autor: Dave Townsend

Publikováno v: Proceedings of the 2022 International Symposium on Molecular Spectroscopy.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9aaaa5c01b6e898ee11162f3da2c44e5
https://doi.org/10.15278/isms.2022.mh01

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Arbitrary image reinflation: A deep learning technique for recovering 3D photoproduct distributions from a single 2D projection

Autor: Chris Sparling, Alice Ruget, Jonathan Leach, Dave Townsend

Publikováno v: The Review of scientific instruments. 93(2)

Many charged particle imaging measurements rely on the inverse Abel transform (or related methods) to reconstruct three-dimensional (3D) photoproduct distributions from a single two-dimensional (2D) projection image. This technique allows for both en

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aefb44e01208e5d44c1ff9b918f36cec
https://pubmed.ncbi.nlm.nih.gov/35232150

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Tomographic reconstruction techniques optimized for velocity-map imaging applications

Autor: Chris Sparling, Dave Townsend

Publikováno v: The Journal of Chemical Physics. 157:114201

Examples of extracting meaningful information from image projection data using tomographic reconstruction techniques can be found in many areas of science. Within the photochemical dynamics community, tomography allows for complete three-dimensional

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6941441a6a830c2a2b06f70aae218c57
https://doi.org/10.1063/5.0101789

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Dynamics of Pyrroles Excited to the 3s/πσ* State

Autor: Raúl Montero, Alvaro Peralta Conde, Iker Lamas, Dave Townsend, Gonzalo Muga, Asier Longarte

Publikováno v: The Journal of Physical Chemistry A. 123:8982-8993

The available experimental data provided by ultrafast dynamics studies of pyrrole and its derivatives in excited states of mixed Rydberg/valence 3s/πσ* character are strongly affected by the interaction with the laser pulses. Understanding these da

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dba28faec2aab6152af01be3ed99e4d0
https://doi.org/10.1021/acs.jpca.9b06045

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Dynamics of electronically excited states in the eumelanin building block 5,6-dihydroxyindole

Autor: James O. F. Thompson, Magnus W. P. Bebbington, Jason B. Greenwood, Thomas Y. Cowie, Stuart W. Crane, O. Ghafur, Anita G. Lindsay, Dave Townsend

Publikováno v: Crane, S W, Ghafur, O, Cowie, T Y, Lindsay, A G, Thompson, J O F, Greenwood, J B, Bebbington, M W P & Townsend, D 2019, ' Dynamics of electronically excited states in the eumelanin building block 5,6-dihydroxyindole ', Physical Chemistry Chemical Physics, vol. 21, no. 15, pp. 8152-8160 . https://doi.org/10.1039/c9cp00620f

We report the first excited state dynamics study of gas-phase 5,6-dihydroxyindole (5,6-DHI), a key building block of eumelanin pigments that are found throughout nature and serve as important photo-protective compounds. Time-resolved ion-yield measur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6facdf59ed9741d6bd429b1d8e441154
https://doi.org/10.1039/c9cp00620f

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Thermal desorption effects on fragment ion production from multi-photon ionized uridine and selected analogues

Autor: P. Papp, Rahul Pandey, Violaine Vizcaino, Samuel Eden, D. Mészáros, J. C. Poully, Janka Bockova, M. Ryszka, Nigel J. Mason, Andre Rebelo, Kate Nixon, Paulo Limão-Vieira, Dave Townsend

Publikováno v: RSC Advances
RSC Advances, 2021, 11 (34), pp.20612-20621. ⟨10.1039/d1ra01873f⟩
RSC Advances, Royal Society of Chemistry, 2021, 11 (34), pp.20612-20621. ⟨10.1039/d1ra01873f⟩

FuEP/E039618/1 EP/J002577/1 EP/L002191/1 MERG-CT-2007-207292 no. 692335 VEGA 1/0489/21 APVV-19-0386 PD/00193/2012 UID/FIS/00068/2020 UID/Multi/04378/2020 Experiments on neutral gas-phase nucleosides are often complicated by thermal lability. Previous

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cedb694cf3baa9374b4df7aef8f9530f
https://hdl.handle.net/10362/136340

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