Zobrazeno 1 - 10
of 85
pro vyhledávání: '"O. Ghafur"'
Autor:
B. Major, K. Kovács, E. Svirplys, M. Anus, O. Ghafur, K. Varjú, M. J. J. Vrakking, V. Tosa, B. Schütte
High-harmonic generation (HHG) normally requires a careful adjustment of the driving laser intensity (typically $10^{14} - 10^{15}$ W/cm$^2$) and gas medium parameters to enable good phase matching conditions. In contrast with conventional wisdom, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed33cfa75c4ada6e802f702288e50ea4
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
https://doi.org/10.1039/c9cp00620f
Autor:
Valer Tosa, Bernd Schütte, Balázs Major, Marc J. J. Vrakking, O. Ghafur, Katalin Kovács, Katalin Varjú
High-intensity laser pulses covering the ultraviolet to terahertz spectral regions are nowadays routinely generated in a large number of laboratories. In contrast, intense extreme-ultraviolet (XUV) pulses have only been demonstrated using a small num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc7daa4b19ddf6432be85a43c43d3718
http://arxiv.org/abs/2012.04566
http://arxiv.org/abs/2012.04566
Autor:
Ingo Will, O. Ghafur, Katalin Kovács, Bernd Schütte, J. Tümmler, Björn Senfftleben, Tamas Nagy, Daniela Rupp, Katalin Varjú, Marc J. J. Vrakking, Balázs Major, Martin Kretschmar, Valer Tosa, A. Hoffmann
Publikováno v:
JPhys Photonics, 2 (3)
The ongoing development of intense high-harmonic generation (HHG) sources has recently enabled highly non-linear ionization of atoms by the absorption of at least 10 extreme-ultraviolet (XUV) photons within a single atom (Senfftleben et al, arXiv:191
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::381cd0c121d4574c5ac03b2bd9a1a278
Akademický článek
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Autor:
A. Young, C. M. M. Bond, Jason B. Greenwood, Daniel L. A. Fernandes, O. Ghafur, Jacinto Sá, Stuart W. Crane, Jordan Miles, David Townsend
Publikováno v:
Analytica Chimica Acta. 984:134-139
We present a proof-of-principle approach for discriminating chiral enantiomers based on the phenomenon of multiphoton photoelectron circular dichroism. A novel stereo detection setup was used to measure the number of photoelectrons emitted from chira
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc9f77a5a9f1556dbc35acedc53b8a33
https://doi.org/10.1016/j.aca.2017.06.051
https://doi.org/10.1016/j.aca.2017.06.051
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
We utilize coherent wavefront shaping to refocus laser pulse scattering in reflection from a wall, to a spot that can be scanned behind a wall to achieve non-line-of- sight imaging with 100 μm resolution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21d4e2e7d0d46bf9feb5c8b00b3219af
https://doi.org/10.1364/cosi.2019.cm2a.3
https://doi.org/10.1364/cosi.2019.cm2a.3
Autor:
W C Wallace, M G Pullen, D E Laban, O Ghafur, Han Xu, A J Palmer, G F Hanne, K Bartschat, A N Grum-Grzhimailo, H M Quiney, I V Litvinyuk, R T Sang, D Kielpinski
Publikováno v:
New Journal of Physics, Vol 15, Iss 3, p 033002 (2013)
Recent experiments in ultrafast physics have established the importance of above-threshold ionization (ATI) experiments in measuring and controlling the carrier-envelope phase (CEP) of few-cycle laser pulses. We have performed an investigation of ato
Externí odkaz:
https://doaj.org/article/afd76357862c46718763773aa8acc576
Publikováno v:
Chemical Physics Letters. 738:136870
Ultrafast time-resolved ion yield spectroscopy using 286 nm excitation reveals more than an order of magnitude difference between the S1(ππ*) excited state lifetimes of several monohydroxyindole (HI) species (4-HI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d557625dba511f537ea25a6c3c6376a
https://doi.org/10.1016/j.cplett.2019.136870
https://doi.org/10.1016/j.cplett.2019.136870
Autor:
Samuel Eden, Simone De Camillis, Lisa Saalbach, Jason B. Greenwood, M. Ryszka, Dave Townsend, Andre Rebelo, Stuart W. Crane, O. Ghafur, Jana Bockova
Publikováno v:
Ghafur, O, Crane, S W, Ryszka, M, Bockova, J, Rebelo, A, Saalbach, L, De Camillis, S, Greenwood, J B, Eden, S & Townsend, D 2018, ' Ultraviolet relaxation dynamics in uracil : Time-resolved photoion yield studies using a laser-based thermal desorption source ', Journal of Chemical Physics, vol. 149, no. 3, 034301, pp. 1-14 . https://doi.org/10.1063/1.5034419
Wavelength-dependent measurements of the RNA base uracil, undertaken with nanosecond ultraviolet laser pulses, have previously identified a fragment at m/z = 84 (corresponding to the C3H4N2O+ ion) at excitation wavelengths ≤232 nm. This has been in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56e21ebe5dd29acf86139913f697991d
https://pubmed.ncbi.nlm.nih.gov/30037254
https://pubmed.ncbi.nlm.nih.gov/30037254