Temat: 33.60.+q - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Photoemission Study of Co Adsorbed on K/Cu(110). Analysis of Adsorbate Induced Structures
Autorzy:: Godowski, P. J.
Onsgaard, J.
Christensen, S. V.
Nerlov, J.
Powiązania:: https://bibliotekanauki.pl/articles/1945414.pdf
Data publikacji:: 1996-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 79.60.Jv
33.60.-q
82.80.Pv
Opis:: Improved adsorption characteristics of a K predosed Cu(110) surface with a coverage corresponding to a point before the work function minimum have been confirmed. Analysis of the CO-induced orbitals in the photoelectron spectra of the CO/K/Cu(110) interface for low coverages of carbon monoxide adsorbed at 118 K has been done. Noticeable changes of the parameters of the orbitals with increasing CO coverage have been registered. Elongation of the C-O bond without dissociation of the molecule has been deduced from the energetic separation of 3.4 eV between the 4σ and the 1π orbital. A weakening of the CO-interface bond with coverage has been found on the base of decreasing 5σ-1π separation with increasing 4σ/5σ intensity ratio. Perpendicular orientation of CO molecules to the plane of the substrate surface has been concluded from analysis of the constant initial state spectra of the 4σ and 5σ/1π orbitals.
Źródło:: Acta Physica Polonica A; 1996, 89, 5-6; 657-664
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Photoemission Study of CO$\text{}_{2}$ adsorbed on K/Cu(110). Analysis of Adsorbate Induced Structures
Autorzy:: Godowski, P. J.
Onsgaard, J.
Hoffmann, S. V.
Nerlov, J.
Powiązania:: https://bibliotekanauki.pl/articles/2007842.pdf
Data publikacji:: 1999-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 79.60.Jv
33.60.-q
82.80.Pv
Opis:: Using photoemission spectroscopy, adsorption and reaction of CO$\text{}_{2}$ on potassium modified Cu(110) were studied. In agreement with published results of thermally programmed desorption, apart from carbonate and carbon monoxide as the disproportionation reaction products, a linear CO$\text{}_{2}$ molecule and a bent active CO$\text{}_{2}$(-) species were identified. The reaction paths are independent on the potassium precoverage but the number of CO$\text{}_{3}$ molecules increases with the number of potassium adatoms. The presence of the CO$\text{}_{2}$(-), stable up to 200 K, suitable for the reactivity of the interface in respect of the methanol synthesis, could be confirmed in the complex valence band spectra by occurrence of the characteristic peak at binding energy of 6.8 eV.
Źródło:: Acta Physica Polonica A; 1999, 95, 3; 423-431
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Electronic Spectra of Radical Cations and their Correlation with Photoelectron Spectra. VI. A Reinvestigation of Two-, Three-, and Four-Ring Condensed Aromatics
Autorzy:: Khan, Z. H.
Powiązania:: https://bibliotekanauki.pl/articles/1924271.pdf
Data publikacji:: 1992-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.20.-t
33.60.-q
31.20.-d
Opis:: Earlier interpretations of the electronic spectra of two-, three-, and four-ring condensed aromatic hydrocarbon radical cations are reexamined in the light of the UV photoelectron spectroscopic data for their neutral precursors and improved open-shell self-consistent field configuration interaction (SCF-CI) calculations. From the electronic transition energies for some 33 aromatic radical cations obtained from electronic absorption spectra (EAS) and those inferred from photoelectron spectra (PES), the following correlation is found between the two types of spectroscopies: E$\text{}_{EAS}$ = (0.23 ± 0.20) + (0.98 ± 0.01)E$\text{}_{PES}$. The slope of this line is very close to unity which shows that the matrix shift on going from the solid phase (electronic spectrum) to the vapour phase (PE spectrum) is almost negligible and that there is no appreciable change in the geometry of the molecules on ionization.
Źródło:: Acta Physica Polonica A; 1992, 82, 6; 937-955
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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