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Helvetica Physica Acta

Helvetica Physica Acta Volume 50 (1977)
Intitulé Page
Cahier 1 1
Article Distinguished self-adjoint extension for Dirac operator with potential dominated by multicenter Coulomb potentials
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1
Article Bremsstrahlung and Čerenkov radiation of high energy particles in an excited medium
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5
Article Bestimmung der spektroskopischen Faktoren mehrerer Energieniveaux der Isotope Ni^59,61, 63, 65 mit (d,p)-Reaktionen bei 2,8 MeV Deuteronenenergie
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9
Article Bestimmung spektroskopischer Faktoren für Energieniveaux der Isotope ^41, 43, 45, 49Ca mit (d,p)-Reaktionen bei 2,5 MeV Deuteronenenergie
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29
Article Untersuchungen zur Bildung von Tracks in Kristallen
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49
Article Modèle semiphénoménologique de l'interaction nucléon-nucléon
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65
Article Spin corrections to the two-body eikonal amplitude
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81
Article A remark on the rate of regeneration in decay processes
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99
Article Selfadjointness and invariance of the essential spectrum for the Klein-Gordon equation
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105
Article On space-like fields
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117
Article On the Koba-Nielsen scaling behaviour for the high-energy multiplicity distributions
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123
Rubrique Zusammenfassungen der letzten eingegangenen Arbeiten = Résumés des derniers articles reçus
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131
Cahier 2 133
Informations des associations Bericht der Herbsttagung der Schweizerischen Physikalischen Gesellschaft vom 8./9. Oktober 1976 in Genf
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133
Article Projective representations of the Schrödinger group
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233
Article Dynamics of the Dicke laser model. II, An example of a semi-classical theory in the presence of focal points
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253
Article Unrestricted solution of the Elishberg equations for Nb
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267
Article On the derivation of the Onsager-Casimir reciprocal relations from the principles of thermodynamics
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279
Erratum Errata
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283
Cahier 3 285
Article On the formation of droplets in supersaturated systems
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285
Article Remarks on exponential interactions and the quantum sine-Gordon equation in two space-time dimensions
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315
Article On the description of free relativistic particles
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331
Article Covariance group in the presence of external electromagnetic fields
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337
Article Elementary particles as representations of the covariance group in the presence of an external electromagnetic field
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349
Article Superradiant phase transition in some generalized Dicke models
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373
Article Détermination du libre parcours moyen dans le cadmium à partir des oscillations de Gantmakher-Kaner
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381
Article Higher order decoupling in the Gorkov theory of superconductivity
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387
Article Onsager's symmetry in higher order fluid dynamics
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393
Article Extension of the final state theorem and the analysis of accurate low energy pion-nucleon scattering and pion photoproduction experiments
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407
Cahier 4 417
Article Zum 60. Geburtstag von Walter Hälg
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417
Article Neutron scattering investigations of the LaNi5 hydrogen storage system
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421
Article Phononen-Dispersion in Na2S
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431
Article Magnetische Austauschwechselwirkung eines dreikernigen Eisenclusters in α-Metavoltin, K_10(Fe_3O(SO_4)_6(H_2O)_3_2 • 12H_2O
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439
Article Crystal field in metallic actinide compounds
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447
Article Ferromagnetismus von Nd_3S_4
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453
Article A method and a computer program for measurement of intensities from twinned and clustered crystals on a 4-circle diffractometer
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459
Article Comparison of power series solutions to the stationary monoenergetic neutron transport equation for slabs
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467
Article An application of the third order JWKB-approximation method to prove absolute continuity. I, The construction
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479
Article An application of the third order JKWB-approximation method to prove absolute continuity. II, The estimates
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495
Article Scattering of protons from argon and hydrogen at 1 MeV
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509
Article Limitations on the use of δ-function potentials as replacements for actual atomic potentials in one-dimensional studies
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513
Article Zur relativistischen Gravitationsenergie
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527
Article A non-homogeneous string model for hadrons
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531
Article Lattice dynamical study of noble metals. I
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545
Cahier 5 557
Informations des associations Bericht über die Frühjahrstagung der Schweizerischen Physikalischen Gesellschaft in Lausanne am 14./15. April 1977 und in Konstanz vom 21.-25. März 1977 für Kern- und Teilchenphysik
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557
Article Lebensdauer der Positronen in Silberbromid
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705
Article Analytic methods for refined resonating group calculations. 1, Reduction to cluster modes
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723
Article Cluster approximations in the effective medium model of site random conductance networks
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741
Rubrique Zusammenfassungen der letzten eingegangenen Arbeiten = Résumés des derniers articles reçus
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755
Appendice Bericht über die Frühjahrstagung der Schweizerischen Physikalischen Gesellschaft in Lausanne am 14./15. April 1977 und in Konstanz vom 21.-25. März 1977 für Kern- und Teilchenphysik
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Cahier 6 757
Article On the phase transition in XY- and Heisenberg models
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757
Article On the phase transition in A^4-phonon theory
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763
Article Indefinite metric, quantum axiomatics, and the Markov property
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767
Article Anomalien der Verbotenen Zone von Sb_2S_3-Kristallen
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773
Article The regular external field problem in quantum electrodynamics
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779
Article Vacuum polarization in Fock space
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803
Article Measurement of the polarization parameter in π^+p-scattering at 291.4 and 310.0 MeV
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815
Article Light cone sum rules for single-pion electroproduction
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825
Article Phasenumwandlung in AgSbS_2 Kristallen
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853
Article A one-fermion-one-boson model for a magnetic elastic system
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857
Article Schwingungen eines Plasmazylinders endlicher Länge in einem äusseren Magnetfeld
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871
Article Boltzmann collision operator without cut-off
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893
Article New free energy and susceptibility inequalities for the Ising-, XY- and Heisenberg-models and the problem of phase transition
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905
Article On the description of classical Einstein relativistic two-particle systems
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917
Table des matières
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930
Index Autorenregister = Table des auteurs
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940