In our group we study fundamental chemical processes at ultrafast timescales. In particular we are interested in how small structural changes, such as isomerism, influence chemical functionality. To do this we develop novel experimental methods based on ultrafast lasers, strong- field control of molecules and charged-particle velocity-map imaging. For current projects have a look at the Research page. Our group is part of the Spectroscopy of Cold Molecules department (headed by Prof. Bas van de Meerakker), and we are located in the Institute for Molecules and Materials at Radboud University in Nijmegen, the Netherlands
News
Saskia joins the group for her MSc internship, working on our photoelectron-photoion coincidence spectrometer. Welcome!
Jantijn joins the group for his BSc internship, working on imaging photoelectron circular dichroism. Welcome!
Grite is off to the UK for beamtime at the HHG Artmis facility @CLF_STFC - good luck!
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Recent Publications
Caballo, Ana; Huits, Anders J. T. M.; Vredenborg, Arno; Balster, Michiel; Parker, David H.; Horke, Daniel A.
Femtosecond 2 + 1 Resonance-Enhanced Multiphoton Ionization Spectroscopy of the C-State in Molecular Oxygen Journal Article
In: J. Phys. Chem. A, vol. 125, no. 41, pp. 9060–9064, 2021, ISSN: 1089-5639.
@article{Caballo:J.Phys.Chem.A125:9060,
title = {Femtosecond 2 + 1 Resonance-Enhanced Multiphoton Ionization Spectroscopy of the C-State in Molecular Oxygen},
author = {Ana Caballo and Anders J. T. M. Huits and Arno Vredenborg and Michiel Balster and David H. Parker and Daniel A. Horke},
url = {https://doi.org/10.1021/acs.jpca.1c05541},
doi = {10.1021/acs.jpca.1c05541},
issn = {1089-5639},
year = {2021},
date = {2021-10-01},
journal = {J. Phys. Chem. A},
volume = {125},
number = {41},
pages = {9060--9064},
publisher = {American Chemical Society},
abstract = {Coincidence electron-cation imaging is used to characterize the multiphoton ionization of O2 via the v = 4,5 levels of the 3s(3$Pi$g) Rydberg state. A tunable 100 fs laser beam operating in the 271\textendash 263 nm region is found to cause a nonresonant ionization across this wavelength range, with an additional resonant ionization channel only observed when tuned to the 3$Pi$g(v = 5) level. A distinct 3s textrightarrow p wave character is observed in the photoelectron angular distribution for the v = 5 channel when on resonance.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ayyer, Kartik; Xavier, P. Lourdu; Bielecki, Johan; Shen, Zhou; Daurer, Benedikt J.; Samanta, Amit K.; Awel, Salah; Bean, Richard; Barty, Anton; Bergemann, Martin; Ekeberg, Tomas; Estillore, Armando D.; Fangohr, Hans; Giewekemeyer, Klaus; Hunter, Mark S.; Karnevskiy, Mikhail; Kirian, Richard A.; Kirkwood, Henry; Kim, Yoonhee; Koliyadu, Jayanath; Lange, Holger; Letrun, Romain; Lübke, Jannik; Michelat, Thomas; Morgan, Andrew J.; Roth, Nils; Sato, Tokushi; Sikorski, Marcin; Schulz, Florian; Spence, John C. H.; Vagovic, Patrik; Wollweber, Tamme; Worbs, Lena; Yefanov, Oleksandr; Zhuang, Yulong; Maia, Filipe R. N. C.; Horke, Daniel A.; Küpper, Jochen; Loh, N. Duane; Mancuso, Adrian P.; Chapman, Henry N.
3D Diffractive Imaging of Nanoparticle Ensembles Using an X-Ray Laser Journal Article
In: Optica, vol. 8, no. 1, pp. 15, 2021, ISSN: 2334-2536.
@article{Ayyer:Optica8:15,
title = {3D Diffractive Imaging of Nanoparticle Ensembles Using an X-Ray Laser},
author = {Kartik Ayyer and P. Lourdu Xavier and Johan Bielecki and Zhou Shen and Benedikt J. Daurer and Amit K. Samanta and Salah Awel and Richard Bean and Anton Barty and Martin Bergemann and Tomas Ekeberg and Armando D. Estillore and Hans Fangohr and Klaus Giewekemeyer and Mark S. Hunter and Mikhail Karnevskiy and Richard A. Kirian and Henry Kirkwood and Yoonhee Kim and Jayanath Koliyadu and Holger Lange and Romain Letrun and Jannik L\"{u}bke and Thomas Michelat and Andrew J. Morgan and Nils Roth and Tokushi Sato and Marcin Sikorski and Florian Schulz and John C. H. Spence and Patrik Vagovic and Tamme Wollweber and Lena Worbs and Oleksandr Yefanov and Yulong Zhuang and Filipe R. N. C. Maia and Daniel A. Horke and Jochen K\"{u}pper and N. Duane Loh and Adrian P. Mancuso and Henry N. Chapman},
url = {https://www.osapublishing.org/abstract.cfm?URI=optica-8-1-15},
doi = {10.1364/OPTICA.410851},
issn = {2334-2536},
year = {2021},
date = {2021-01-01},
urldate = {2021-06-21},
journal = {Optica},
volume = {8},
number = {1},
pages = {15},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Warne, Emily M.; Smith, Adam D.; Horke, Daniel A.; Springate, Emma; Jones, Alfred J. H.; Cacho, Cephise; Chapman, Richard T.; Minns, Russell S.
Time Resolved Detection of the S(1D) Product of the UV Induced Dissociation of CS2 Journal Article
In: J. Chem. Phys., vol. 154, no. 3, pp. 034302, 2021, ISSN: 0021-9606, 1089-7690.
@article{Warne:J.Chem.Phys.154:034302,
title = {Time Resolved Detection of the S(1D) Product of the UV Induced Dissociation of CS2},
author = {Emily M. Warne and Adam D. Smith and Daniel A. Horke and Emma Springate and Alfred J. H. Jones and Cephise Cacho and Richard T. Chapman and Russell S. Minns},
url = {http://aip.scitation.org/doi/10.1063/5.0035045},
doi = {10.1063/5.0035045},
issn = {0021-9606, 1089-7690},
year = {2021},
date = {2021-01-01},
urldate = {2021-06-21},
journal = {J. Chem. Phys.},
volume = {154},
number = {3},
pages = {034302},
abstract = {The products formed following the photodissociation of UV (200 nm) excited CS2 are monitored in a time resolved photoelectron spectroscopy experiment using femtosecond XUV (21.5 eV) photons. By spectrally resolving the electrons, we identify separate photoelectron bands related to the CS2 + h$nu$ textrightarrow S(1D) + CS and CS2 + h$nu$ textrightarrow S(3P) + CS dissociation channels, which show different appearance and rise times. The measurements show that there is no delay in the appearance of the S(1D) product contrary to the results of Horio et al. [J. Chem. Phys. 147, 013932 (2017)]. Analysis of the photoelectron yield associated with the atomic products allows us to obtain a S(3P)/S(1D) branching ratio and the rate constants associated with dissociation and intersystem crossing rather than the effective lifetime observed through the measurement of excited state populations alone.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}