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Showing papers in "Nuclear Physics in 1958"


Journal ArticleDOI
F. Coester1
TL;DR: In this article, the bound state Schrodinger equation is constructed in terms of an arbitrary complete set of single particle wave functions, and the components of the state vector are related in a simple manner to functions represented by linked diagrams only.

880 citations


Journal ArticleDOI
TL;DR: In this paper, a theory of the energy states and the electromagnetic transitions between them for nuclei which do not possess axial symmetry was developed and the reduced probabilities for E2 and M1 transitions between various rotational states were computed.

735 citations


Journal ArticleDOI
TL;DR: In this paper, an empirical analysis of the mean effective internucleon potential required in the shell-model description of nuclei, allowing for the presence of many-body effects as suggested by current theory is made.

686 citations


Journal ArticleDOI
TL;DR: In this article, two methods leading to general prescriptions for the construction of the time independent perturbation expansions for bound states to all orders are discussed, and the accuracy of the expansions are tested by a calculation of two eigenvalues of the Mathieu equation.

562 citations


Journal ArticleDOI
TL;DR: In this paper, the general formalism of scattering theory is extended to cover reactions in which more than two particles exist in the entrance or exit channels, and the behaviour of the scattering matrix in this general case is discussed at arbitrary energies, in particular near thresholds.

301 citations


Journal ArticleDOI
TL;DR: In this paper, an effective deuteron-nucleus potential consisting of an optical well plus a spin-orbit interactive was derived, starting from a Saxon potential and a spinorbit term for the interaction between each nucleon in the deuterons and the nuclens.

286 citations


Journal ArticleDOI
TL;DR: In this article, the Brillouin-Wigner perturbation method is extended to the case where the ground state of the unperturbed system is degenerate, as, for instance, in a nucleus with an incomplete shell.

261 citations


Journal ArticleDOI
TL;DR: In this article, the Gibbs potential is expressed as an expansion in terms of linked diagrams, and the general case of a system of interacting bosons and fermions is treated.

223 citations


Journal ArticleDOI
TL;DR: The long-range correlation model, i.e., the hydrodynamic "second-sound" model, of the photonuclear effect predicts a splitting of the giant resonance in deformed nuclei.

220 citations


Journal ArticleDOI
K. Wildermuth1, Th. Kanellopoulos1
TL;DR: In this paper, a method is discussed which makes it possible to see that in nuclei many different cluster structures are present, and which cluster structure are preferred depends on the form and strength of the interaction forces, the type of nucleus and the excitation levels of this nucleus.

180 citations


Journal ArticleDOI
TL;DR: The angular anisotropy of particles emitted in compound processes is due to restrictions on the directions of their angular moments, which are imposed by the angular momentum distribution of the residual nucleus.

Journal ArticleDOI
TL;DR: In this article, the Gartenhaus wave function is given in a numerical form, by an analytic expression which is simple enough to be useful in the various integrals which arise when one calculates phenomena involving the deuteron.

Journal ArticleDOI
TL;DR: The linked diagram expansions of the ground state energy and wave function of a system of particles are derived by a method involving the use of the time-dependent as well as the timeindependent formulations of perturbation theory.

Journal ArticleDOI
TL;DR: In this article, the authors provided a theoretical analysis of the direct reaction of a high energy photon to the ejection of a neutron and a proton, based on impulse and closure approximations.

Journal ArticleDOI
TL;DR: In this paper, the Gibbs potential is expressed as an expansion in terms of linked diagrams, and it reduces to the Goldstone expansion for the ground state energy at a finite temperature, the only difference with the latter comes from temperature dependent weight factors associated with every line of the diagrams.

Journal ArticleDOI
TL;DR: In this paper, a classification of angular momentum-isobaric spin functions which can be present in the ground state wave function of H3 is carried out by methods of group theory, based on the behaviour of the functions under rotations of the co-ordinate axes and permutations of the three nucleons.

Journal ArticleDOI
TL;DR: In this paper, it was shown that the cluster model of Wildermuth and Kanellopoulos provides an alternative description of certain states in the SU 3 coupling scheme of Elliott, and that it can be used for the SU 2 coupling scheme as well.

Journal ArticleDOI
K. Wildermuth1, Th. Kanellopoulos1
TL;DR: In this paper, it was shown that two kinds of nuclear rotational levels exist: the first kind appears in light nuclei, but a clear rotational energy spectrum is only very seldom connected with this, and the second kind appears rather regularly in heavy nuclei with large deformations.

Journal ArticleDOI
TL;DR: In this article, the spin polarisation of (d, p) protons and the correlation function of de-excitation γ-rays are expressed on this theory as functions of statistical tensors ϱ kq which can in principle be calculated given the details of the process (wave functions, interaction potential etc.).

Journal ArticleDOI
TL;DR: In this article, the sign and magnitude of polarization of γ-rays emitted in opposite direction to the neutrinos were measured to be 80±30% circularly polarized with negative helicity.

Journal ArticleDOI
TL;DR: In this paper, the authors measured the energy carried away by each of the two coincident protons from (p, 2p) reactions in elements bombarded by 185 MeV protons by range analysis.

Journal ArticleDOI
TL;DR: In this paper, it was shown that magnetic deflection depends only on the mass of the fission fragments passing through a gas-filled magnetic spectrograph, and the best resolution obtained for mass-97 fragments was 3.5 % full width at half maximum (with 20 mm-Hg of helium), of which 2.2 % is due to the nuclear charge distribution.

Journal ArticleDOI
TL;DR: In this paper, a theory of anomalous internal eonversion for E1 tramsitions is presented, and selection rules for the relevant nuclear m:itrix elements are given in the quantum numbers appropriate to spheroidally deformed nuclei (K, N, n/sub z/, LAMBDA, SIGMA ).

Journal ArticleDOI
TL;DR: In this paper, energy and angular correlation measurements on the two protons emerging from high energy (p, 2p) processes may give direct information on the structure of the ground state of the bombarded nucleus and of certain excited states of the residual one.

Journal ArticleDOI
TL;DR: In this paper, the decay energy of 203Pb is estimated to be 950−70+300 keV and αK = 0.118±0.011 for the 404 keV transition.

Journal ArticleDOI
TL;DR: In this article, the average nuclear potential has been extended to consideration of spin-orbit interactions and it has not been possible to find a satisfactory two-body interaction consistent with all the data; that suggested by the phase shift analysis of nucleon-nucleon scattering is just within the region of possible forms.

Journal ArticleDOI
TL;DR: In this paper, a covariant formalism for handling electron polarization was proposed and applied to the study of polarization effects in electron-electron collisions, which can be used for the measurement of the transverse and longitudinal polarization of relativistic electrons.


Journal ArticleDOI
TL;DR: In this article, a simple approximation for the calculation of quasi-free proton-proton scattering using distorted incoming and outgoing waves is described, which is applied to Li 7, and the results show that in this light nucleus the refraction by the collective nuclear potential does not destroy the strong connection between the angular correlation of the emerging protons and the momentum distribution of the knocked-out proton in the nuclear shell concerned.

Journal ArticleDOI
TL;DR: In this paper, the probability of finding alpha-particles in nuclear matter, and their momentum distribution, has been investigated, and it has been shown that there is a forward excess of energetic alpha particles in each case, and this can be accounted for by direct interaction processes.