Results 21 to 30 of about 5,389 (204)
Sensors, 2021 Atmospheric photoionization is a widely applied soft ionization mechanism in gas sensing devices for the detection of volatile organic compounds in ambient air. Photoionization is typically induced by low-pressure Vacuum Ultraviolet (VUV) lamps with MgF2
Adelaide Miranda, Pieter A. A. De Beule
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New Journal of Physics, 2015 Femtosecond vacuum ultraviolet pulses from a monochromated high harmonic generation source excite vibrational wavepackets in the ${B}^{1}{{\rm{\Sigma }}}_{{\rm{g}}}^{+}$ state of D _2 .
A R Bainbridge +6 more
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Measuring the photoelectron emission delay in the molecular frame
Nature Communications, 2021 Measuring photoionization time delays is an interesting and challenging topic. Here the authors demonstrate a method to measure the photoionization time delays using inner-shell ionization of CO molecule.
Jonas Rist +24 more
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Sensors, 2022 Because of its simplicity, reliability, and sensitivity, the drift tube ion mobility spectrometer (IMS) has been recognized as the equipment of choice for the on-site monitoring and identification of volatile organic compounds (VOCs).
Binwang Yang +5 more
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Angewandte Chemie, EarlyView.We introduce a novel chemical derivatisation strategy for the UV‐activated detection of elusive metabolites. Incorporation of a tocopherol‐active chromophore allows for the detection of tagged analytes as photoionised radical cations, selectively induced by a 266 nm laser.
Sofia R. McGowan +5 more
wiley +2 more sources
Angewandte Chemie, EarlyView.We report selective five‐coordinate passivation of phosphorene via P═C double bonds using a facile one‐step photochemical reaction via carbene addition. The ambient stability of functionalized phosphorene has been substantially improved compared to the pristine phosphorene.
He Zhang +12 more
wiley +2 more sources
Photoionization Time Delays [PDF]
, 2015 The material presented in this chapter is based on important advances realized in “attophysics” which make feasible to follow the motion of electrons in atoms and molecules with attosecond-level time resolution. In this context, time-delays have been recently determined in the process of photoionization by extreme-ultra-violet (XUV) pulses and the ...
Dahlström, J M +4 more
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On Phase and Amplitude Extraction in Bichromatic Ionization: A Proposal
Photonics, 2023 In the paper we propose a method for characterizing VUV pulse(s) in a bichromatic ionization setup. The scheme is based on s-shell ionization by joint action of circularly polarized fundamental harmonic and linearly polarized second one. The advantage of
Maria M. Popova +2 more
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Photoionization in alkali lasers
Optics Express, 2011 We have calculated photoionization rates in alkali lasers. The photoionization of alkali atoms in the gain medium of alkali lasers can significantly degrade the laser performance by reducing the neutral alkali density and with it the gain. For a ten atmosphere Rb laser and a Cs exciplex laser, the photoionization induced alkali atom loss rates are ...
R J, Knize, B V, Zhdanov, M K, Shaffer
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EnergiesPhotoionization is a significant factor influencing the morphology and propagation characteristics of streamers in insulating oil, yet research on the impact of photoionization on streamer branching is almost nonexistent.
Yihua Qian, Qing Wang
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