Showing papers in "Annals of Physics in 1967"

TL;DR: In this paper, the authors present a mathematical description of the condensation point for a simple class of models of first-order phase transitions and apply it to a simple model of a ferromagnet at temperatures well below the Curie point.

TL;DR: In this article, an intermediate model is proposed to describe the transition amplitude averaged over an energy interval which is much larger than the width and spacing of the compound nuclear levels, but much smaller than widths of the structure in the optical model cross sections.

TL;DR: In this article, the conditions for plasma equilibrium in an arbitrary magnetic field and their relation to the lowest order particle adiabatic invariants, and the form of the higher order contributions to these invariants are investigated.

TL;DR: The divergent part of Z3−1 is (Z 3 −1 )div = α0 2π 2 3 + α 0 2π − 1 4 α02π 2 log M 2 m 2 to sixth order in the bare charge e0, in a model in which corrections to internal photon lines in the vacuum polarization tensor are neglected as discussed by the authors.

TL;DR: In this paper, the unified theory of nuclear reactions is employed to derive general expressions which are valid in the presence of direct interactions as well as well separated or overlapping compound nuclear resonances, explicitly satisfy the requirements of unitarity, and involve the minimal number of real parameters.

TL;DR: In this article, a spin 1/2 system coupled to a single mode through an interaction term of the formκ( a + a * )σ x is treated in some detail to illustrate the type of analysis involved.

TL;DR: In this article, the inelastic form factor for electron scattering from the 4.43-MeV level in 12 C is calculated, using the wave functions obtained from a Projected Hartree-Fock calculation.

TL;DR: In this article, the authors investigated the behavior of a product of an arbitrary number of interacting field operators, when evaluated near the same point, and showed that the integral equations implied by this equation are valid in all orders of renormalized perturbation theory.

TL;DR: In this paper, the Coulomb cross-section for a hard-sphere Fermi gas is calculated to lowest order in the gas parameter, which can be used to obtain single particle momentum distributions and binding energies.

TL;DR: In this article, the formation ratios of the Li, Be, and B isotopes in CNONe were determined using a simple rule which classifies the cross sections in terms of their isotopic spin parameters.

TL;DR: In this paper, the energy dependence of the nuclear optical model potential for neutrons is derived from a nonlocal formalism, which can be used over the whole energy range from 0 to 150 MeV and probably even beyond.

TL;DR: In this paper, the properties of nuclear matter have been calculated for the Hamada-Johnston, Reid, and Bressel-Kerman potentials by the reference-spectrum method.

TL;DR: In this article, the normal modes of oscillation of an idealized uniformly charged axially symmetric liquid drop about its saddle-point shape and their frequencies as functions of the fissility parameter x were derived.

TL;DR: In this paper, a planar satellite electrostatic probe theory based on reversible particle trajectories is proposed, showing relation between boundary curve in velocity space and current-voltage characteristics.

TL;DR: In this paper, the effects of the two-pion exchange ΛNN force on the binding energies of Λ 5 He and Λ 3 H were examined in detail, and the effect of W p on Λ 4 He was shown to be repulsive and quite appreciable.

TL;DR: In this article, a new method is developed for the study of deuteron stripping reactions, where the cross section is expressed in terms of a matrix element which differs in form from that usually employed, while an explicit function S (1 − S) 2 of the spectroscopic factor S emerges as a multiplying factor.

TL;DR: In this paper, the gross structure of isobaric analog resonances in the N, Z + 1 system is described in terms of the intermediate structure associated with the analogs of the low-lying states of the N + 1, Z nucleus.

TL;DR: In this article, the general relationship between one-parameter continuous symmetries and conserved currents in local Lagrangian field theories is reexamined, and the one-to-one correspondence between those local continuous symmetry transformations of the system which leave invariant the Euler-Lagrange equations from the original and transformed Lagrangians is developed.

TL;DR: In this paper, it was shown that the Lipschitz condition was, in fact, also superfluous and that the future trajectories would be uniquely determined, and well behaved, if past histories of the particles were given satisfying certin conditions.

TL;DR: A mathematical analysis of the existence of the formal number-of-particles operator N = ⩞a k ∗ a k for a representation of the canonical commutation relations, where ak is the kth annihilation operator, is given in this paper.

TL;DR: In this article, the total cross sections for neutron-nucleus scattering are examined in detail to determine whether Lane-Thomas-Wigner giant resonances in the strength functions ever cause corresponding maxima in the energy-dependence of the energyaveraged total cross-sections.

TL;DR: In this paper, the authors consider the superconvergence sum rules for higher-spin targets and their mutual connections, and discuss the structure of algebra and algebra sum rules with respect to non-regge asymptotic behavior.

TL;DR: Cosmological model for universe based on astronomical observations and validity of einstein theory and existing laws of physics is proposed in this paper, which is based on a cosmological approach.

TL;DR: In this article, a unified theory of identical particles is proposed that encompasses theories arising both from the permutation-symmetry approach of the first-quantized theory and from the parastatistics commutation-relation approach of second-quantised theory.

TL;DR: In this paper, a quasi-free scattering of electrons on nuclei resulting in the emission of proton is investigated using the effective Hamiltonian of Mc Voy and Van Hove for the electron-nucleon interaction.

TL;DR: In this paper, the equations of radiative transfer for an electron-scattering atmosphere, as developed by Chandrasekhar, are solved using Case's method of singular eigensolutions.

TL;DR: In this article, the effects of non-gauge-invariant potentials in quantum field theory are analyzed. But the effects are not necessarily quantum mechanical in nature and not necessarily related to the appearance of nongauges in the formulation of the theory.

TL;DR: The derivation is based on the requirement that a certain quantity, which is the adequate measure for the knowledge of the observer about the state of the system, cannot increase during the evolution in time after the last observation.

TL;DR: In this paper, the collapse and explosion of a highly evolved stellar core is treated in the framework of general relativistic hydrodynamics, including radiative transfer by neutrinos.

TL;DR: In this article, the number of terms in a compound observable is derived for parity conserving reactions and the structure of observables in terms of the type of traces they contain is studied.