Showing papers in "Nuclear Physics in 1962"

TL;DR: In this article, the structure of the particle source in the classical theory is calculated, and some qualitative features of the interactions between these particles and mesons are described, and the way in which a non-linear meson field theory of this type may contain its own sources, and how these may be idealised to point singularities, as in the conventional field theories of interacting linear systems, is formulated.

TL;DR: In this article, an energy independent nucleon-nucleon potential model was proposed to represent the n-p data in a satisfactory manner for the first time, and the phase shifts predicted by the model were in fair agreement with the solutions YLAM ( T = 1) and YLAN3M (T = 0) recently found by the Yale group.

TL;DR: In this article, an energy independent non-local optical potential for the elastic scattering of neutrons from nuclei is proposed and the wave-equation solved numerically in its full integro-differential form.

TL;DR: The isobaric spin dependence of the real part of the nuclear potential is investigated in this paper, which is expected theoretically from the action of Heisenberg forces and the exchange effects of other forces.

TL;DR: In this paper, the classical solutions of a unified field theory in a two-dimensional space-time are considered, and a model of interacting mesons and baryons is presented.

TL;DR: In this article, the transmission coefficients T l and total reaction cross section σ R for alpha particles in the energy range 0-46 MeV interacting with 20 target nuclei with atomic numbers ranging from 10 to 92 are calculated with an optical model program in which a previously determined complex nuclear potential is utilized.

TL;DR: In this paper, the authors investigated the relationship between translational and rotational degeneracies in the Hartree-Fock equations and the existence of solutions of the time-dependent equations which represent uniform translational or rotational motions.

TL;DR: In this article, the ergodicity conditions employed are sufficiently realistic, since it has been proved that they are in particular satisfied by that class of Hamiltonians for which Van Hove succeeded in deriving a master equation.

TL;DR: In this paper, the authors considered deviations from the principal "harmonic" approximation in the framework of the microscopic theory of the collective excitations of spherical even nuclei and derived the corrections to the wave functions, energy levels and the E2 transition probabilities for the first two excited states.

TL;DR: In this paper, it was shown that a real or complex antisymmetric second order tensor transforming according to either the real orthogonal or the unitary group can always be put into a canonical form in which it appears as the direct sum of a zero matrix and of 2×2 antisymmetric matrices.

TL;DR: In this article, the translational motion of a nucleus is described in terms of a linear combination of wave functions, each of which is generated from the Hartee-Fock wave function of the shell model, including deformation, by a linear displacement and a linear velocity.

TL;DR: In this article, an attempt is made at generalizing commutation relations of creation and annihilation operators in field theory, and the algebra for these operators is determined in such a way that they form a basis of representations of either an infinite-dimensional rotation group (R-type) or an infinitely-dimensional symplectic group (S-type).

TL;DR: In this article, the yields of gamma rays resulting from Coulomb excitation have been measured for fifteen even nuclei of nickel, zinc, germanium and selenium, and the observed values for B (E2) are larger than the single-particle estimate by factors ranging from 11 for Ni 58 to 51 for Se 76.

TL;DR: In this paper, the magnitude of two-nucleon stripping reactions is calculated using the pairing interaction model, and a collective enhancement of the reaction cross section is predicted for some types of reaction.

TL;DR: In this article, the Mg24(d, p)Mg25 reaction has been studied at an incident energy of 10 MeV with a 24 channel magnetic spectrograph.

TL;DR: In this paper, the exact wave function of the bound 3-nucleon system is obtained in a particularly elegant form which admits of a simple physical interpretation and is easily amenable to mathematical treatment for applications in nuclear physics at low energies.

TL;DR: In this article, a non-singular velovity-dependent potential is adjusted to fit the experimental phase-shifts in the four states singlet, even, odd, and triplet, even and odd, to obtain a rough fir comparable to the Gammel-Thaler fit with hard core potentials.

TL;DR: In this paper, the effect of the pairing interaction on the long range residual interactions is assumed to be quadropole-quadrupole and octupole-octopole interactions and independent of the spin and isobaric spin.

TL;DR: A general formula for Talmi coefficients is obtained, making it possible to pass from the wave functions of two particles having different masses μ1 and μ1 moving in the oscillator potential V(r 1, r 2 ) = 1 2 μ 1 ωr 1 2 + 1 2μ 2 ω r 2 2 to the wave function describing the relative motion of these particles and the motion of their centre of mass as discussed by the authors.

TL;DR: In this article, a compilation of all reported (n, p) cross sections induced by neutrons approximately 14 MeV in energy was made, and the cross sections were predicted using an equation that is a function only of the atomic number and the atomic weight.

TL;DR: In this paper, the authors measured the total cross sections for (n, 2n), (n and p) and (n α) reactions for several nuclei around Z = 40 by the activation method, and the predictions of compound nucleus theory compared with the experiment.

TL;DR: In this article, it is shown that cross sections involving levels of the nuclei Be 8, Be 9 and B 9 which have been interpreted in terms of ϱ (2) can be satisfactorily explained on the basis of ϑ(1).

TL;DR: In this article, the pairing energies of two neutrons delta, and two protons delta p are calculated from the difference of the masses of odd mass and adjacent even nuclei, taking into account the corrections for the difference in the surface and Coulomb energies as well as the symmetry energies in these nuclei.

TL;DR: In this article, the results of calculations of μ-mesonic energy levels and some auxiliary quantities derived from the bound muon wave functions are presented, and the results are exact insofar as the nucleus may be regarded as a static spherically symmetric charge distribution.

TL;DR: In this article, a study is made of the properties of isobaric states revealed in recent observations of (p, n) reactions, and it is suggested that, while the data demonstrate the existence of correspondence between states of adjacent isobars, they do not directly indicate the degree of purity of Isobaric spin in the target nucleus.

TL;DR: In this article, it was shown that the first term of a series expansion of the differential radiation cross-section in the energy of the radiated quantum may be expressed in terms of the elastic scattering amplitudes at the incident and final energies.

TL;DR: In this article, the T = 1 states of C 12 are calculated within the particle-hole formalism, and the results are compared with experiment, both with and without ground-state correlations.

TL;DR: Kallen's formal treatment of quantum electrodynamics without the aid of perturbation theory is applied to a fourth order computation of the complete one-electron propagator as mentioned in this paper.