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See detailPhotoionization Mass Spectrometry of Kinetic Energy-selected ions. The Translational Energy Distribution of N+/N2 in the Inner-shell Ionization energy range.
Locht, Robert ULg; Denzer, W.; Rühl, E. et al

in Chemical Physics (1992), 160

An ion retarding potential difference (IRPD) method has been used to investigate the ion yield and the kinetic energy distributions of N+/N2 produced by photoionization mass spectrometry using synchrotron ... [more ▼]

An ion retarding potential difference (IRPD) method has been used to investigate the ion yield and the kinetic energy distributions of N+/N2 produced by photoionization mass spectrometry using synchrotron radiation. Photoion yield curves of energy selected N+ ions are deduced. Translational energy distributions of N+ at the energies of the N(1s)->pi*, N(1s)->(nl)1 and above the N(1s)-1 threshold are determined. Comparison is made with previous photoion-photoelectron coincidence work using time-of-flight (TOF) measurements. [less ▲]

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See detailCore Level Excitation of Atomic and Molecular Clusters.
Rühl, E.; Schmale, C.; Jochims, H. W. et al

in Beswick, A. (Ed.) Synchrotron Radiation and Dynamic Phenomena. (1992)

Core level excitation of weakly bonded atomic and molecular species is reported. Excitations into unoccupied orbitals with valence and Rydberg character as well as into the corresponding K- and L-continua ... [more ▼]

Core level excitation of weakly bonded atomic and molecular species is reported. Excitations into unoccupied orbitals with valence and Rydberg character as well as into the corresponding K- and L-continua are compared with the isolated and condensed species. Core level excitation of clusters is also accompagned with extensive fragmentation of singly and doubly charged clusters. Coincidence techniques such as photoelectron-photoion-coincidences (PEPICO) and photoion-photoion-coincidence (PIPICO) are used to study the photochemical fragmentation pathways of core excited clusters. Kinetic energy releases related to charge separation of cluster dications (Coulomb explosion) are derived from PIPICO spectra. The fragmentation energetics is discussed in relation to cluster dication threshold energies. [less ▲]

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See detailCore Level Excitation in molecular Clusters.
Rühl, E.; Schmale, C.; Baumgärtel, H. et al

Book published by Berliner Elektronen Speicherring für Synchrotron Strahlung m.b.H (1991)

The photoionization of CO at the C-Kedge and that of its dimer are measured. The photodissociation of the cluster ion is investigated by PEPICO and PIPICO techniques.

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See detailA new way to look at Photoionization Mass Spectrometry: an Ion Retarding Potential Difference Method.
Locht, Robert ULg; Rühl, E.; Hagenow, G. et al

in 9th International Conference on Vacuum Ultraviolet Radiation Physics: Program and Abstracts. (1989)

Photoionization efficiency curves of O+/O2 recorded at different ion retarding potential settings are measured with increments of 50 meV. From these data ion retarding potential difference ionization ... [more ▼]

Photoionization efficiency curves of O+/O2 recorded at different ion retarding potential settings are measured with increments of 50 meV. From these data ion retarding potential difference ionization efficiency curves are obtained. [less ▲]

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See detailAn Ion Retarding Potential Difference Method applied to Dissociative Photoionization Mass Spectrometry.
Locht, Robert ULg; Rühl, E.; Hagenow, G. et al

in Dalgarno, A.; Freund, R. S.; Lubell, M. S. (Eds.) et al 16th International Conference on the Physics of Electronic and Atomic Collisions: Abstract of Contributed Papers. (1989)

Dissociative photoionization of O2 has been investigated by using the ion retarding potential for the translational energy analysis of the O+ fragment. Synchrotron radiation is used as a light source ... [more ▼]

Dissociative photoionization of O2 has been investigated by using the ion retarding potential for the translational energy analysis of the O+ fragment. Synchrotron radiation is used as a light source. Ionization efficiency curves have been recorded at several retarding potential settings. [less ▲]

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See detailA Mass Spectrometric Photoionization Study of CH3F. The CH2+, CH3+ and CH2F+ Ion Formation.
Locht, Robert ULg; Momigny, J.; Rühl, E. et al

in Chemical Physics (1987), 117

The decay of CH3F+ in the CH2+, CH3+ and CH2F+ dissociation channels has been investigated by photoionization mass spectrometry using synchrotron radiation in the energy range 10-25 eV. The ... [more ▼]

The decay of CH3F+ in the CH2+, CH3+ and CH2F+ dissociation channels has been investigated by photoionization mass spectrometry using synchrotron radiation in the energy range 10-25 eV. The photoabsorption curve of CH3F and the ionization efficiency curves of CH2+, CH3+ and CH2F+ as well as the kinetic energy-versus-appearance energy diagram for CH3+ were recorded. For the three fragment ions dissociative autoionization is a prominent formation process. Direct dissociative ionization is observed for the same ions through the decomposition of the CH3F+(A2A1+B2E) states at 16.1 eV as well as presumably of the C2A1 state at about 22.5 eV. [less ▲]

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See detailThe Dissociative Photoionization of O2 and N2O.
Locht, Robert ULg; Hagenow, G.; Rühl, E. et al

Book published by Berliner Elektronen Speicherring für Synchrotron Strahlung m.b.H. (BESSY) - Jahresbericht/Annual Report (1987)

The dissociative photoionization of O2 and N2O is investigated using synchrotron radiation. The results on the O+ and NO+ dissociation channels are reported.

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See detailThe Dissociative Ionization of CH3F. A Mass Spectrometric Photoionization study using Synchrotron Radiation.
Locht, Robert ULg; Rühl, E.; Momigny, J. et al

in Gilbody, H. B.; Newell, W. R.; Read, F. H. (Eds.) et al Electronic and Atomic Collisions: Abstracts of Contributed Papers. (1987)

The dissociation channel of CH3F+hnu->CH3++F has been investigated by photoionization using synchrotron radiation. The kinetic energy-versus-appearance energy diagram of CH3+ has been reported and ... [more ▼]

The dissociation channel of CH3F+hnu->CH3++F has been investigated by photoionization using synchrotron radiation. The kinetic energy-versus-appearance energy diagram of CH3+ has been reported and analyzed. [less ▲]

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See detailThe Dissociative Photoionization of CH3F.
Locht, Robert ULg; Rühl, E.; Momigny, J. et al

Book published by Berliner Elektronen Speicherring für Synchrotron Strahlung m.b.H. (BESSY) (1987)

The kinetic energy distributions of CH3+/CH3F are measured at different wavelengths using monochromatized synchrotron radiation. The ionization efficiency curves of CH3+ are measured for different kinetic ... [more ▼]

The kinetic energy distributions of CH3+/CH3F are measured at different wavelengths using monochromatized synchrotron radiation. The ionization efficiency curves of CH3+ are measured for different kinetic energies. The resulting kinetic energy-versus-appearance energy is reported. [less ▲]

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