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Helvetica Physica Acta

Helvetica Physica Acta Volume 51 (1978)
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Issue 1 1
Association News: Rapport de la session de la Société Suisse de Physique à Berne les 7 et 8 octobre 1977 1
Article: Kernreaktionen mit 9Be 115
Article: Relativistic dynamics for the spin 1/2 particle 146
Article: A new relativistic model for the hydrogen atom 157
Article: A proof of spontaneous magnetization in the d-dimensional ising-, XY- and Heisenberg-models, d>2 167
Article: Untersuchungen am stationären Nachglühen einer HF-Ionenquelle 173
Article: Magnetoelastic effects on the elastic constants of HoAl2 178
Rubric: Zusammenfassungen der letzten eingegangenen Arbeiten = Résumés des derniers articles reçus 182
Appendix: Rapport de la session de la Société Suisse de Physique à Berne les 7 et 8 octobre 1977 _
Issue 2 183
Article: Stochastic processes. I, Asymptotic behaviour and symmetries 183
Article: Stochastic processes. II, Response theory and fluctuation theorems 202
Article: Schrödinger invariant generalized heat equations 220
Article: Systems of two quantal Einstein relativistic particles 240
Article: Group-theoretical aspects of the Wigner-Weyl isomorphism 252
Article: Elektronentemperatur magnetisch stabilisierter Hochfrequenz-Gasentladungen 262
Article: Solution of an apparent inconsistency in the concept of mean free path 268
Article: Quantitative Spurenanalyse mit ioneninduzierter Röntgenstrahlung 272
Article: X-ray study of the low temperature phases of alkali hyperoxides 298
Article: The number of states bound by non-central potentials 321
Issue 3 331
Article: A l'occasion du soixantième anniversaire de M. Jean Rossel, professeur à l'université de Neuchâtel 331
Article: (n,d) elastic differential cross section at 2,48 and 3.28 MeV 333
Article: F-center pairs in KCl-effects of light excitation, static magnetic field and magnetic resonances on F and F^- absorption bands 337
Article: Oscillateur amorti quantique 346
Article: The coherence effect in many nucleons systems and some applications 354
Article: Optical approach to hadron-nucleus scattering 363
Article: Observation of the 15.1 MeV (1^+) state in carbon-12 by π^+ inelastic scattering near the πN(3,3) resonance 380
Article: Étude expérimentale de la réaction π^+ + ^4_2He → π^+π^- ppd à 1,7 GeV/c 383
Article: The conversion laws of nonrelativistic classical and quantum mechanics for a system of interacting particles 393
Article: On regular external fields in quantum electrodynamics 412
Issue 4 425
Association News: Rapport de la session de printemps de la Société Suisse de Physique à Neuchâtel les 30 et 31 mars 1978 425
Article: Electromagnetic corrections in hadron scattering, with application to πN → πN 584
Article: General solution of multichannel partial-wave dispersion relations. I, Coincident thresholds, pole approximation 608
Appendix: Rapport de la session de printemps de la Société Suisse de Physique à Neuchâtel les 30 et 31 mars 1978 _
Issue 5-6 635
Article: On the impossibility of a finite propositional lattice for quantum mechanics 635
Article: About the structure - preserving maps of a quantum mechanical propositional system 637
Article: Physical justification for using the tensor product to describe two quantum systems as one joint system 661
Article: Space-like fields and non-unitary representations of the Poincaré group 676
Article: Analysis of ^3He + ^4He elastic scattering between 18 and 70 MeV with the resonating group method of Brown and Tang 680
Article: On a mathematical model for non-stationary physical systems 685
Article: Relation between the critical current and the order parameter in a Josephson array 716
Article: Measurement and interpretation of α-^58Ni elastic scattering from 27 to 49 MeV 726
Article: Methode zur schnellen und genauen Berechnung des Vakuum-Polarisations-Potentials der Ordnung α(Zα) 743
Article: Prof. G. Busch zum 70. Geburtstag 750
Article: Le moment quadrupolaire du niveau de 37 keV du ^80Br 755
Article: On the microscopic theory for high temperature superconductors 775
Article: The vectorboson and graviton propagators in the presence of multipole forces 783
Article: On bound states of the infinite harmonic crystal 793
Article: Effet de peau anormal dans un plasma d'argon 804
Article: Equilibrium equations for classical systems with long range forces and application to the one dimensional Coulomb gas 829
Erratum: Erratum 867
Table of Contents 868
Index: Autorenregister = Table des auteurs 877