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Study of the Auger line shape of polyethylene and diamond
A96 524
Surface Science 138 (1984) 5244548 North-Holland, Amsterdam
AVERAGE ATOMIC ORDER EFFECT - PREDICTION OF BULK AND SURFACE PROPERTIES OF LIQUID METALLIC SYSTEMS L. GOUMIRI
* and J.C. JOUD
Laboratoire de Thermodynamique et de Physico-Chimie, Mktallurgiques asso& au CNRS, ENSEEG, Domaine Universiiaire, BP 75, F-38402 Saint Martin d’H&-es, France Received
24 April 1983; accepted
for publication
1 November
1983
The average atomic order effect is studied in liquid alloys using a statistical model based on quasichemical approximation. In the first part an estimate of the composition dependence of this order effect is made assuming a good representation of thermodynamic data for segregating and ordering systems. In the second part corresponding surface properties of this systems are calculated with this model and compared with experimental surface tensions and surface concentration values. For the ordering system (Ni-Si), the local order in the surface layer is calculated.
Surface Science 138 (1984) 549-560 North-Holland, Amsterdam
549
STUDY OF THE AUGER LINE DIAMOND M. DAYAN * and S.V. PEPPER
SHAPE
National Aeronautics and Space Administration,
Lewis Research Center, Cleveland, Ohio 44135, USA
Received
24 August
1983; accepted
for publication
OF POLYETHYLENE
5 December
AND
1983
The KW Auger electron line shapes of carbon in polyethylene and diamond have been studied. The spectra were obtained in derivative form by electron beam excitation. They were treated by background subtraction, integration and deconvolution to produce the intrinsic Auger line shape. Electron energy loss spectra provided the response function in the deconvolution procedure. The line shape from polyethylene is compared with spectra from linear alkanes and with a previous spectrum of Kelber et al. Both spectra are compared with the self-convolution of their full valence band densities of states and of their p-projected densities. The experimental spectra could not be understood in terms of existing theories. This is so even when correlation effects are qualitatively taken into account according to the theories of Cini and Sawatzky and Lenselink.
Surface Science 138 (1984) 5244548 North-Holland, Amsterdam
AVERAGE ATOMIC ORDER EFFECT - PREDICTION OF BULK AND SURFACE PROPERTIES OF LIQUID METALLIC SYSTEMS L. GOUMIRI
* and J.C. JOUD
Laboratoire de Thermodynamique et de Physico-Chimie, Mktallurgiques asso& au CNRS, ENSEEG, Domaine Universiiaire, BP 75, F-38402 Saint Martin d’H&-es, France Received
24 April 1983; accepted
for publication
1 November
1983
The average atomic order effect is studied in liquid alloys using a statistical model based on quasichemical approximation. In the first part an estimate of the composition dependence of this order effect is made assuming a good representation of thermodynamic data for segregating and ordering systems. In the second part corresponding surface properties of this systems are calculated with this model and compared with experimental surface tensions and surface concentration values. For the ordering system (Ni-Si), the local order in the surface layer is calculated.
Surface Science 138 (1984) 549-560 North-Holland, Amsterdam
549
STUDY OF THE AUGER LINE DIAMOND M. DAYAN * and S.V. PEPPER
SHAPE
National Aeronautics and Space Administration,
Lewis Research Center, Cleveland, Ohio 44135, USA
Received
24 August
1983; accepted
for publication
OF POLYETHYLENE
5 December
AND
1983
The KW Auger electron line shapes of carbon in polyethylene and diamond have been studied. The spectra were obtained in derivative form by electron beam excitation. They were treated by background subtraction, integration and deconvolution to produce the intrinsic Auger line shape. Electron energy loss spectra provided the response function in the deconvolution procedure. The line shape from polyethylene is compared with spectra from linear alkanes and with a previous spectrum of Kelber et al. Both spectra are compared with the self-convolution of their full valence band densities of states and of their p-projected densities. The experimental spectra could not be understood in terms of existing theories. This is so even when correlation effects are qualitatively taken into account according to the theories of Cini and Sawatzky and Lenselink.