1. Negative affinity 3–5 photocathodes: Their physics and technology

   • W. E. Spicer

   Invited Paper Pages: 115 - 130

2. Incomplete magnetic ordering in Fe_2(1−y)Mg_1+y Ti _y O₄ spinels with intermediate compositiony

   • E. De Grave
   • C. Dauwe
   • J. De Sitter

   Contributed Papers Pages: 131 - 136

3. Electronic conduction mechanisms of Cs- and B-implanted SiO₂-films

   • W. Gärtner
   • M. Schulz

   Contributed Papers Pages: 137 - 148

4. Raster scanning depth profiling of layer structures

   • K. Wittmaack

   Contributed Papers Pages: 149 - 156

5. Barkhausen effect in magnetic thin films: Experimental noise spectra

   • N. J. Weigman

   Contributed Papers Pages: 157 - 161

6. Intrinsic and experimental quasiparticle recombination times in superconducting films

   • W. Eisenmenger
   • K. Laßmann
   • R. Krauß

   Contributed Papers Pages: 163 - 171

7. Implantation doping of germanium with Sb, As, and P

   • A. Axmann
   • M. Schulz
   • C. R. Fritzsche

   Contributed Papers Pages: 173 - 178

8. Studies of martensitic transformation in Cu-Al alloys by positron annihilation

   • T. Kojima
   • K. Kuribayashi
   • M. Doyama

   Contributed Papers Pages: 179 - 181

9. The effect of impurities on the lifetime of positrons in voids in molybdenum

   • N. Thrane
   • J. H. Evans

   Contributed Papers Pages: 183 - 185

10. The relationship between void size and positron lifetime in neutron irradiated molybdenum

    • N. Thrane
    • K. Petersen
    • J. H. Evans

    Contributed Papers Pages: 187 - 189

11. Dye laser probing of primary C₂ radicals formed by IR intense field photolysis of ethylene

    • N. V. Chekalin
    • V. S. Dolzhikov
    • A. N. Shibanov

    Contributed Papers Pages: 191 - 195

12. Energy distribution of post-accelerated electrons field-emitted from carbon fibres

    • H. Heinrich
    • M. Essig
    • J. Geiger

    Contributed Papers Pages: 197 - 202

13. Distributed variable-capacitance microstrip lines for microwave applications

    • D. Jäger
    • J. P. Becker

    Contributed Papers Pages: 203 - 207

14. Effects on spontaneous emission on dynamic characteristics of semiconductor lasers

    • Kenji Kajiyama
    • Susumu Hata
    • Seizou Sakata

    Letter Papers Pages: 209 - 210

15. Characteristics of CO₂ TE-amplifiers with different UV preionization at superatmospheric pressure with doping additives

    • H. Hübner
    • Ch. Homann

    Letter Papers Pages: 211 - 212

16. A second-order perturbation method for potential calculations in non-homogeneous conducting layers

    • G. De Mey

    Letter Papers Pages: 213 - 215

17. Positron lifetime as a function of grain size

    • H. P. Leighly Jr.

    Letter Papers Pages: 217 - 218

18. Geometrical effects on the isotopically selective photodissociation of SF₆ under CO₂ laser pulses

    • P. Fettweis
    • M. Nève de Mévergnies

    Letter Papers Pages: 219 - 220

19. Forthcoming papers

    Abstract Pages: 221 - 223

20. Book reviews

    • P. Gerthsen
    • J. Wess
    • J. Schnakenberg

    BookReview Pages: 224 - 226