The influence of the substrate's elastic reflection coefficient r on the IL electron current

CONTENT

PREFACE

1. PHYSICAL ASPECTS OF IONIZATION SPECTROSCOPY TECHNIQUE

1.1. The nature of ionization spectra

1.2. The role of elastic scattering in ionization spectrum formation for reflection geometry

1.3. Inelastic electron scattering

1.4. IL contour

1.5. Fine structure of ionization spectrum

1.6. Ionization losses

1.7. Opportunities of ionization spectroscopy

2. IONIZATION SPECTROSCOPY EQUIPMENT

2.1. Electron spectrometer

2.2. Electron gun

3. IL DETECTION

3.1. Detection specifics

3.2. Acceleration voltage fluctuations

3.3. Auger lines suppression

4. ADJUSTMENT OF SPECTROMETER'S ELECTRON OPTICS

5. SPECTROMETER CALIBRATION

5.1. The goal of calibration

5.2. Calibration of kinetic energy scale

5.3. Electron energy loss scale

5.4. Inspection of spectrometer’s adjustment and calibration

6. INTENSITY OF IONIZATION LINES

6.1. IL intensity

6.2. Primary electron energy selection

7. SURFACE ANALYSIS BY MEANS OF IS

7.1. Qualitative composition analysis technique

7.2. Standard samples technique

7.3. Elemental sensitivity coefficients technique

7.4. Analysis depth

7.5. Investigation of chemical bonding between the atoms

References

For this the influence of the substrate's elastic reflection coefficient r on the IL electron current of the adsorbate was investigated. When the value of r2 (substrate) was greater than r1 (adsorbate), the dependency of the IL electron current on the adsorbate's thickness had a maximum, which was higher as the ratio r2/r1 was larger.
This experimental evidence does not find explanation in the single stage model, but can be nicely interpreted by the double stage model [Ref 2, Ref 3, Ref 4], and also Nakhodkin N.G., Melnik P.V., Koval I.F. Ionizatsionnaja spectroscopija poverhnosti tverdogo tela // Poverxnost. Fizika, himija, mehanika. 1982. ¹. –p.1-14).

"Handbook of Ionization Spectra"
ISBN 966-02-1954-7
© T. Afanasieva, I. Koval,V. Lysenko, P. Mel'nik, N. Nakhodkin, M. Pyatnitsky
Ukrainian National Academy of Science, Ukrainian Ministry of Education and Science
Taras Schevchenko University, Radiophysical department
tel.: +38(044)526-05-60
e-mail: afanasieva@univ.kiev.ua