Dissociative photoionisation of hexafluorobenzene

Kinugawa, Tohru; Hodgekins, A. M.; Eland, J. H. D.

doi:10.1016/s0301-0104(02)00913-8

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…9 Due to the opposing requirement of high electron energy resolution, which in the past has dictated low extraction fields, and the desired high ion collection efficiency, which is enhanced by high extraction fields, coincidence experiments often pulse the ions out of the ionization region once the photoelectron has been detected. [10][11][12][13][14][15] Pulsed extraction means that ions are accumulated in the ionization region for a certain time until they are extracted following a start pulse. This may lead to more false coincidences and possibly many more counts per TOF cycle than in a continuous experiment.…”

Section: Introductionmentioning

confidence: 99%

Data acquisition schemes for continuous two-particle time-of-flight coincidence experiments

Bodi¹,

Sztáray²,

Baer³

et al. 2007

Review of Scientific Instruments

164

171

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Three data acquisition schemes for two-particle coincidence experiments with a continuous source are discussed. The single-start/single-stop technique, implemented with a time-to-pulse-height converter, results in a complicated spectrum and breaks down severely at high count rates. The single-start/multiple-stop setup, based on a time-to-digital converter and the first choice in today's similar coincidence experiments, performs significantly better at high count rates, but its performance is still hampered if the time-of-flight range is large, and the false coincidence background is variable if the event frequency and the collection efficiency of the starts are both high. A straightforward, multistart/multistop setup is proposed for coincidence experiments. By collecting all detector data, it ensures the highest signal-to-noise ratio, constant background, and fast data acquisition and can now be easily constructed with commercially available time-to-digital converters. Analytical and numerically evaluated formulas are derived to characterize the performance of each setup in a variety of environments. Computer simulated spectra are presented to illustrate the analytically predicted features of the various raw time-of-flight distributions obtained with each technique.

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Section: Introductionmentioning

confidence: 99%

Data acquisition schemes for continuous two-particle time-of-flight coincidence experiments

Bodi¹,

Sztáray²,

Baer³

et al. 2007

Review of Scientific Instruments

164

171

View full text Add to dashboard Cite

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Double photoionization of halogenated benzene

AlKhaldi

Wehlitz

2016

The Journal of Chemical Physics

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We have experimentally investigated the double-photoionization process in C6BrF5 using monochromatized synchrotron radiation. We compare our results with previously published data for partially deuterated benzene (C6H3D3) over a wide range of photon energies from threshold to 270 eV. A broad resonance in the ratio of doubly to singly charged parent ions at about 65 eV appears shifted in energy compared to benzene data. This shift is due to the difference in the bond lengths in two molecules. A simple model can explain the shape of this resonance. At higher photon energies, we observe another broad resonance that can be explained as a second harmonic of the first resonance.

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Dissociative photoionisation of hexafluorobenzene

Cited by 2 publications

References 23 publications

Data acquisition schemes for continuous two-particle time-of-flight coincidence experiments

Data acquisition schemes for continuous two-particle time-of-flight coincidence experiments

Double photoionization of halogenated benzene

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