Ultraviolet inverse photoemission spectrograph with parallel multichannel isochromat acquisition

Sancrotti, M.; Braicovich, L.; Chemelli, C.; Ciccacci, Franco; Puppin, E.; Trezzi, G.; Vescovo, E.

doi:10.1063/1.1142062

Cited by 42 publications

(11 citation statements)

References 19 publications

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“…UV IPE measurements have been carried out with an apparatus working in the 10-32-eV h range. 11,12 Energy calibration has been achieved by means of reference standard metals as described in Ref. 13.…”

Section: Methodsmentioning

confidence: 99%

Hybridization effects in unoccupied 4fstates of Ce compounds

et al. 1996

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An energy shift of the f 2 feature is detected between inverse photoemission surface and bulk f line shapes in Ce compounds. A comparison with analogous Lu compounds shows a systematic enhancement of the 4 f surface shift in the case of Ce ͑up to 0.3 eV͒. This effect is interpreted as an extra ''hybridization shift'' in good agreement with the results of an Anderson impurity Hamiltonian calculation. These findings show that the on-site f -f correlation energy does not increase at the surface indicating unchanged screening dynamics despite the reduced nearest-neighbors coordination.

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Section: Methodsmentioning

confidence: 99%

Hybridization effects in unoccupied 4fstates of Ce compounds

et al. 1996

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“…IPES spectra in the X-ray range were obtained at a photon energy of 1486.7 eV with a total energy resolution of 0.7 eV. IPES measurements in the UV range have been carried out with an apparatus based on a spherical grating with large solid angle dispersion onto a flat field [19]. Several isochromats were measured simultaneously by a microchannel plate with discrete anodes.…”

Section: Methodsmentioning

confidence: 99%

Spectroscopic evidence of configuration-dependent hybridization in a cerium compound: CeRh3

Duó

Vavassori

Braicovich

et al. 1997

Z. Phys. B - Condensed Matter

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Evidence is given for a configuration dependent hybridization in the spectroscopy of a strongly hybridized compound like CeRh 3 . This is achieved by comparing the results of 4f inverse photoemission and Ce 3d core level spectroscopies to the predictions of the single impurity Anderson model (SIAM). This analysis shows that the SIAM is not able to quantitatively describe, within a single set of parameters, the results of both spectroscopies. A considerably better agreement with experiments is instead obtained when changes in the hybridization parameter are allowed in the different final states. This result suggests that the hybridization between f and band states strongly depends on the 4f configuration as theoretically predicted.

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“…So far, IPES has been performed using grating spectrometers in the vacuum ultraviolet (VUV) range, with photon energies between 10 and 100 eV. [24][25][26][27][28][29][30][31][32] There are several drawbacks. First, the collection efficiency of photons is limited by the solid angle of the grating.…”

Section: Introductionmentioning

confidence: 99%

“…However, the reflectance of the aluminum coated mirrors is low in the VUV range (particularly below 170 nm) and the surface easily deteriorates in air. 33 In order to design a spectrometer without mirrors, a concave or toroidal grating has been used for IPES at grazing angles, 24 and at the normal angle with the Roland circle [25][26][27][28] or off-Roland circle [29][30][31][32] configurations. The diffraction efficiency of such gratings is in the range of 4% 27,31 to 15%.…”

Section: Introductionmentioning

confidence: 99%

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Low-energy inverse photoemission spectroscopy using a high-resolution grating spectrometer in the near ultraviolet range

Yoshida

2013

Review of Scientific Instruments

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An inverse photoemission spectroscopy (IPES) apparatus using a Czerny-Turner grating spectrometer is demonstrated. Previous IPES instruments based on grating spectrometers used a concave grating and operated in the vacuum ultraviolet range. The reflectance of such gratings is lower than 20% and the aberration cannot be finely corrected leading to an energy resolution of up to 0.1 eV. In the present study, employing the low energy IPES regime [H. Yoshida, Chem. Phys. Lett. 539-540, 180 (2012)], incident electrons with a kinetic energy below 5 eV are used, while photon emission in the range of between 250 and 370 nm is analyzed with a 10-cm Czerny-Turner grating spectrometer. The signal intensity is at least 30 times higher than the previous apparatus. The resolution of photon detection is set at 0.07 eV though the ultimate resolution is one order of magnitude higher. The experiment is performed both by sweeping the electron energy (isochromat mode) and by simultaneously analyzing the photon of whole wavelength range (tunable photon energy mode).

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Ultraviolet inverse photoemission spectrograph with parallel multichannel isochromat acquisition

Cited by 42 publications

References 19 publications

Hybridization effects in unoccupied 4fstates of Ce compounds

Hybridization effects in unoccupied 4fstates of Ce compounds

Spectroscopic evidence of configuration-dependent hybridization in a cerium compound: CeRh3

Low-energy inverse photoemission spectroscopy using a high-resolution grating spectrometer in the near ultraviolet range

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