Results 31 to 40 of about 26,112 (242)

Photoionization Efficiencies of Five Polycyclic Aromatic Hydrocarbons [PDF]

open access: yes, 2017
We have measured photoionization-efficiency curves for pyrene, fluoranthene, chrysene, perylene, and coronene in the photon energy range of 7.5-10.2 eV and derived their photoionization cross-section curves in this energy range.
Paul E. Schrader   +17 more
core   +1 more source

Resonantly enhanced photoionization in correlated three-atomic systems

open access: yesNew Journal of Physics, 2012
Modifications of photoionization arising from resonant electron–electron correlations between neighbouring atoms in an atomic sample are studied. The sample contains atomic species A and B , with the ionization potential of A being smaller than the ...
B Najjari, C Müller, A B Voitkiv
doaj   +1 more source

The study of negative needle-to-plane corona discharge with photoionization under various air pressures

open access: yesAIP Advances, 2021
The characteristics of negative corona discharge in practical applications are strongly dominated by environmental parameters, such as air pressure.
B. X. Lu, L. J. Song
doaj   +1 more source

Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode

open access: yesSensors, 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
doaj   +1 more source

VUV excitation of a vibrational wavepacket in D2 measured through strong-field dissociative ionization

open access: yesNew 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
doaj   +1 more source

Measuring the photoelectron emission delay in the molecular frame

open access: yesNature 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
doaj   +1 more source

Miniaturized Photo-Ionization Fourier Deconvolution Ion Mobility Spectrometer for the Detection of Volatile Organic Compounds

open access: yesSensors, 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
doaj   +1 more source

Photoionization Time Delays [PDF]

open access: yes, 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
openaire   +2 more sources

Radiative recombination data for modeling dynamic finite-density plasmas [PDF]

open access: yes, 2006
We have calculated partial final-state resolved radiative recombination (RR) rate coefficients from the initial ground and metastable levels of all elements up to and including Zn, plus Kr, Mo, and Xe, for all isoelectronic sequences up to Na-like ...
Badnell, N.R.
core   +5 more sources

Photoionization in alkali lasers

open access: yesOptics 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
openaire   +2 more sources

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