A new gas phase electron spectrometer at Max-Lab

Osborne, S. J.; Ausmees, A.; Forsell, J. O.; Wannberg, B.; Bray, G.; Dantas, L. B.; Svensson, S.; Brito, A. Naves de; Kivimäki, A.; Aksela, S.

doi:10.1080/08940889408261249

Cited by 46 publications

(11 citation statements)

References 7 publications

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“…[18][19][20] The measurements were made using a truncated hemispherical electron-energy analyzer. 21 The analyzer includes a retarding electron lens with a gas cell built onto the first lens element. The analyzer is mounted at the pseudo magic angle 54.7°with respect to the polarization plane of the undulator radiation for these measurements.…”

Section: Methodsmentioning

confidence: 99%

The resonant Auger electron spectrum of C 1s−1π* excited ethene: A combined theoretical and experimental investigation

Fink

Sorensen

Brito

et al. 2000

The Journal of Chemical Physics

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A theoretical study of the chiroptical properties of molecules with isotopically engendered chiralityThe resonant Auger electron spectrum for ethene has been calculated with an ab initio approach using configuration-interaction energies and wave functions for the intermediate core-excited and final states. The transition rates were determined by the ''one-center approximation.'' The role of vibrational relaxation on the line shapes was described by a moment method which considers the case of symmetric core holes and their localization due to the vibrational relaxation of the core-excited state. The core hole localization is investigated in some detail and is found to be extremely efficient in the C 1s Ϫ1 * excited state of ethene. Another property of the core-excited state is found to be the polarization of the valence electron density toward the core hole. We demonstrate this by using three different symmetric configuration interaction representations and one nonsymmetric Hartree-Fock representation for this state. A modified improved virtual orbitals method is described and employed to obtain virtual orbitals which give a compact description of this effect. The theoretical spectra obtained in this way are compared with a measured spectrum and assignment of the structures in the spectrum to electronic configurations is made. We find strong configuration mixing in the higher excited final states which is evidence for the breakdown of the one-particle picture.

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Section: Methodsmentioning

confidence: 99%

The resonant Auger electron spectrum of C 1s−1π* excited ethene: A combined theoretical and experimental investigation

Fink

Sorensen

Brito

et al. 2000

The Journal of Chemical Physics

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“…12 The analyzer is provided with multichannel detection and an efficient differentially pumped electron lens. Electrons are retarded to low analyzer pass energies, usually to 10 or 20 eV.…”

Section: Methodsmentioning

confidence: 99%

The vibrationally resolved participator Auger spectra of selectively excited C 1s(2σ)−12π1 vibrational states in carbon monoxide

Osborne

Ausmees

Svensson

et al. 1995

The Journal of Chemical Physics

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Band shape and vibrational structure in Auger spectra: Theory and application to carbon monoxide J. Chem. Phys. 95, 6634 (1991);The fully vibrationally resolved participator Auger spectra originating from the decay of the C 1s͑2͒ Ϫ1 2 1 resonance in CO are presented. The C 1s͑2͒ Ϫ1 2 1 vЈϭ0 resonance has been excited with a 75 meV monochromator bandpass, i.e., in Auger resonant Raman conditions, and the participator Auger spectrum observed. The C 1s͑2͒ Ϫ1 2 1 vЈϭ1 resonance is also excited and the corresponding participator Auger spectrum observed with a monochromator bandpass slightly larger than the inherent width. The results are compared to theoretical simulations using coherent lifetime-vibrational interference theory which accounts for the details of the spectrum. We have observed an interference shift on the transitions to different vibrational sublevels in the final state. A high resolution C 1s photoelectron spectrum of CO is also presented. The lifetime width of the C 1s core-hole state is determined to be 97͑10͒ meV, whereas the C 1s͑2͒ Ϫ1 2 1 resonance is measured to have a width of 86͑10͒ meV.

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“…The undulator and the monochromator were provided by a Finnish consortium, whereas the Uppsala group provided an advanced electrostatic electron spectrometer. 42,43 It was possible to study core levels up to about 500 eV with high resolutions. The resolution in the spectra was by a factor of 3-4 in comparison with earlier measurements.…”

Section: Synchrotron Radiation Revolutionmentioning

confidence: 99%

Uppsala and Berkeley: Two essential laboratories in the development of modern photoelectron spectroscopy

Mårtensson

Föhlisch

Svensson

2022

Journal of Vacuum Science &Amp; Technology A

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The development of modern photoelectron spectroscopy is reviewed with a special focus on the importance of research at Uppsala University and at Berkeley. The influence of two pioneers, Kai Siegbahn and Dave Shirley, is underlined. Early interaction between the two centers helped to kick-start the field. Both laboratories have continued to play an important role in the field, both in terms of creating new experimental capabilities and developing the theoretical understanding of the spectroscopic processes.

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A new gas phase electron spectrometer at Max-Lab

Cited by 46 publications

References 7 publications

The resonant Auger electron spectrum of C 1s−1π* excited ethene: A combined theoretical and experimental investigation

The resonant Auger electron spectrum of C 1s−1π* excited ethene: A combined theoretical and experimental investigation

The vibrationally resolved participator Auger spectra of selectively excited C 1s(2σ)−12π1 vibrational states in carbon monoxide

Uppsala and Berkeley: Two essential laboratories in the development of modern photoelectron spectroscopy

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