Simultaneous observation of dipole-bound and valence electron states in pyridine tetramer anion

1998 ◽  
Vol 109 (22) ◽  
pp. 9656-9659 ◽  
Author(s):  
Sang Yun Han ◽  
Jeong Hyun Kim ◽  
Jae Kyu Song ◽  
Seong Keun Kim
Keyword(s):  
Valence Electron ◽  
Simultaneous Observation ◽  
Electron States

Valence states analysis of Ca and Si in CaSi2 during CaSi2–H2O reaction

1998 ◽  
Vol 13 (5) ◽  
pp. 1401-1404 ◽  
Author(s):  
S. Abe ◽  
H. Nakayama ◽  
T. Nishino ◽  
S. Iida
Keyword(s):  
Applied Voltage ◽  
Lower Energy ◽  
Valence Electron ◽  
Peak Shift ◽  
Peak Position ◽  
Pt Electrode ◽  
Electron States ◽  
Dc Voltage ◽  
Valence States ◽  
Auger Spectra

The changes in the valence electron states of CaSi2 during the chemical reaction with H2O have been investigated by Auger Valence Electron Spectroscopy (AVES). In order to study the reaction process, the reaction was precisely controlled by applying dc voltage between Pt electrode and CaSi2 specimen. The Si[2s, 2p,V] Auger spectra of CaSi2 specimen remain unchanged under the applied voltage lower than −15 V relative to the Pt electrode in H2O. At higher applied voltage, 3p components of Si[2s, 2p, V] (V = 3s, 3p) Auger spectra get weak while the 3s components increase drastically. The peak position due to Ca[2p, 3p, 3p] transitions gradually shifted toward the lower energy side by raising the applied voltage. The peak shift is due to the formation of Ca–O bonds in CaSi2. A new peak, which arises from the split of the valence electron states in Ca atoms due to the Ca–O bonds, appeared in Ca[2p, 3p,V] Auger spectra for CaSi2 after the reaction with H2O.

Cross Sections for Photoionization from Valence-Electron States

1958 ◽  
Vol 30 (3) ◽  
pp. 992-993 ◽  
Author(s):  
A. Burgess ◽  
M. J. Seaton
Keyword(s):  
Cross Sections ◽  
Valence Electron ◽  
Electron States

Valence-electron states ofYBa2Cu3O7−δcharacterized by combined x-ray and photoemission studies

1990 ◽  
Vol 41 (7) ◽  
pp. 4050-4055 ◽  
Author(s):  
G. Dräger ◽  
F. Werfel ◽  
J. A. Leiro
Keyword(s):  
Valence Electron ◽  
Electron States ◽  
X Ray

Auger valence electron spectra in Ca-silicides

1997 ◽  
Vol 12 (2) ◽  
pp. 407-411 ◽  
Author(s):  
S. Abe ◽  
H. Nakayama ◽  
T. Nishino ◽  
S. Iida
Keyword(s):  
Electron Spectroscopy ◽  
Valence Electron ◽  
Electron States ◽  
Auger Peak ◽  
Electron Spectra ◽  
Valence Electrons ◽  
Auger Spectra ◽  
The Difference

CaSi2 and CaSi have been investigated by Auger Valence Electron Spectroscopy (AVES). Some drastic differences of the Auger peak due to 3s states in the Si atoms were observed in the Si[2s, 2p, V] Auger spectra. The peak that arised from valence electron states in the Ca atoms was observed in the Ca[2p, 3p, V] Auger spectra for both Ca-silicides. This result suggests that the Ca–Si bonds are partially ionic. However, the number of the valence electrons in Ca atoms for CaSi was larger than that for CaSi2. This result implies that the part of homopolar bonds between the Si and Ca atoms in CaSi is stronger than that in CaSi2. Based on these results, it has been concluded that the change of the Si [2s, 2p,V] Auger spectra is associated with the difference of the part of homopolar bonds between the Si and Ca atoms.

scholarly journals Cross Sections for Photoionization from Valence-Electron States

1958 ◽  
Vol 8 ◽  
pp. 992-993
Author(s):  
A. Burgess ◽  
M. J. Seaton
Keyword(s):  
Electron Temperature ◽  
Excited States ◽  
Cross Sections ◽  
Radiative Recombination ◽  
Valence Electron ◽  
Transition Probabilities ◽  
Electron States ◽  
Positive Ions ◽  
Gaseous Nebulae ◽  
Recombination Processes

In order to study recombination processes in gaseous nebulae, one requires the coefficients for radiative recombination to many excited states of neutral atoms and positive ions. These may be calculated as functions of electron temperature once the corresponding photoionization cross sections are known. For photoionization from valence-electron states a general formula has been obtained using a method which is an extension of that used by Bates and Damgaard for bound-bound transition probabilities.

Empty and filled valence-electron states of Lu–transition-metal compounds: An uv spectroscopy study

1994 ◽  
Vol 49 (15) ◽  
pp. 10159-10165 ◽  
Author(s):  
L. Duò ◽  
P. Vavassori ◽  
M. Finazzi ◽  
L. Braicovich ◽  
G. L. Olcese
Keyword(s):  
Transition Metal ◽  
Valence Electron ◽  
Uv Spectroscopy ◽  
Transition Metal Compounds ◽  
Spectroscopy Study ◽  
Metal Compounds ◽  
Electron States
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