scholarly journals Development of a new database for Auger electron and X-ray spectra

2020 ◽  
Vol 232 ◽  
pp. 01006
Author(s):  
B. P. E. Tee ◽  
T. Kibédi ◽  
B. Q. Lee ◽  
M. Vos ◽  
R. du Rietz ◽  
...  
Keyword(s):  
Experimental Data ◽  
Auger Electron ◽  
Correction Method ◽  
Atomic Transition ◽  
Relaxation Model ◽  
Auger Electrons ◽  
Transition Energies ◽  
X Ray ◽  
Atomic Relaxation ◽  
Qed Effects

An energy correction method is described to account for the Breit and QED effects on Auger electrons and X-ray energies in the recently developed atomic relaxation model BrIccEmis. The results are compared with literature and new experimental data for Z = 52. Overall this improves the agreement of the calculated energies with the literature values. A new atomic radiation database NS_Radlist, will contain atomic transition energies from the BrIccEmis program with these energy corrections.

Developments in Scanning Auger Microscopy

1978 ◽  
Vol 36 (3) ◽  
pp. 280-291
Author(s):  
J.A. Venables ◽  
A.P. Janssen
Keyword(s):  
Auger Electron ◽  
Light Element ◽  
Mean Free Path ◽  
Element Analysis ◽  
Auger Electrons ◽  
X Ray ◽  
Atomic Relaxation ◽  
Auger Microscopy ◽  
Energy Processes ◽  
Inelastic Mean Free Path

In the last decade, Auger Electron Spectroscopy (AES) has become a standard tool of surface physics and chemistry. Under electron bombardment, atoms emit Auger electrons having characteristic energies, so that the atomic species present can be identified after the manner of X-ray spectroscopy. AES is complementary to X-ray spectroscopy in several ways. First, it is much more surface sensitive, since the inelastic mean free path for Auger electrons, whose energies are typically in the range 50 - 1500 eV, is ~ lnm. Second, atomic relaxation following the primary ionization results in either an X-ray or an Auger electron. Auger emission is dominant for low energy processes, so that AES is relatively more favourable for light element analysis than X-ray spectroscopy.

scholarly journals Core-hole Electronic Structure Studies on Molecules using Synchrotron Radiation

1996 ◽  
Vol 49 (2) ◽  
pp. 457 ◽  
Author(s):  
Frank P Larkins
Keyword(s):  
Experimental Data ◽  
Electronic Structure ◽  
Synchrotron Radiation ◽  
Auger Electron ◽  
Core Hole ◽  
X Ray ◽  
Theoretical Investigations ◽  
Recent Developments ◽  
Simple Molecules

Some recent developments in the study of core-hole photoabsorption, photoionisation, X-ray emission, Auger electron decay and photofragmentation processes for molecules are discussed. The emphasis is on the interpretation of experimental data obtained from synchrotron radiation studies. New insights which are being obtained through theoretical investigations into the electronic and nuclear properties of excited and ionised states of simple molecules are reviewed.

scholarly journals Auger Electron?Ion Coincidence Studies to Determine the Pathways in Soft X-ray Induced Fragmentation of Isolated Molecules

1986 ◽  
Vol 39 (5) ◽  
pp. 633 ◽  
Author(s):  
W Eberhardt ◽  
EW Plummer ◽  
In Whan Lyo ◽  
R Reininger ◽  
R Carr ◽  
...  
Keyword(s):  
Auger Electron ◽  
Core Hole ◽  
Final State ◽  
Auger Electrons ◽  
X Ray ◽  
Fragment Ions ◽  
Valence Electrons ◽  
Molecular Bond ◽  
Doubly Charged ◽  
Insight Into

We report a coincidence .experiment between energy selected Auger electrons and the ions produced in the events following the absorption of a soft X-ray photon by a CO molecule. This study allows us to correlate specific double hole final state configurations of the Auger decay of a core hole in this molecule with the production of fragment ions, thus giving new experimental insight into the potential energy curves of the doubly charged molecular ion and the involvement of individual valence electrons into the molecular bond in general.

Evidence for ordered Fe3Ni

1987 ◽  
Vol 45 ◽  
pp. 216-217
Author(s):  
K.B. Reuter ◽  
D.B. Williams ◽  
J.I. Goldstein
Keyword(s):  
Experimental Data ◽  
Martensitic Transformation ◽  
Electron Diffraction ◽  
Room Temperature ◽  
Direct Evidence ◽  
Transformation Product ◽  
Iron Meteorites ◽  
X Ray ◽  
Ni Content ◽  
Temperature Transformation

In the Fe-Ni system, although ordered FeNi and ordered Ni3Fe are experimentally well established, direct evidence for ordered Fe3Ni is unconvincing. Little experimental data for Fe3Ni exists because diffusion is sluggish at temperatures below 400°C and because alloys containing less than 29 wt% Ni undergo a martensitic transformation at room temperature. Fe-Ni phases in iron meteorites were examined in this study because iron meteorites have cooled at slow rates of about 10°C/106 years, allowing phase transformations below 400°C to occur. One low temperature transformation product, called clear taenite 2 (CT2), was of particular interest because it contains less than 30 wtZ Ni and is not martensitic. Because CT2 is only a few microns in size, the structure and Ni content were determined through electron diffraction and x-ray microanalysis. A Philips EM400T operated at 120 kV, equipped with a Tracor Northern 2000 multichannel analyzer, was used.

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