The note presents some exact, static spherically-symmetric solutions of the Einstein–Maxwell equations. The Kuchowicz solutions are shown to be particular members of these.
Junction conditions for the Einstein–Cartan theory are calculated from the geometry on the two sides of the hypersurface of discontinuity. Formulae in Gaussian normal coordinates are obtained for the Einstein tensor. Examples of the junction conditions are given for static spherically symmetric stars. including a constant mass and spin density Schwarzschild-like interior solution.
In the present paper we reformulate the thermodynamical model and compare the model calculations of invariant inclusive single particle distributions with experimental data. We apply the model to hadron–hadron collisions especially to Kp, \(\pi \)p and pp reactions and consider the production of neutral, strange and charged particles; carefully respecting kinematical limits and quantum number conservation. The calculated spectra are in agreement with the data of differential and integrated invariant inclusive single particle cross sections.
By means of the concepts of nucleon dissociation spectator-behaviour and the impuls approximation the gross features of the reaction pp \(\to \) pn\(\pi ^+\) at 19 GeV/\(c\) incident momentum are well reproduced.
Various experimental results, including multiplicities of shower-particles and heavy prong particles, correlations between them and single particle distributions, from proton–emulsion nucleus reactions in the energy range 200–400 GeV are presented.
The \(^{89}\)Y(\(\alpha , 2n\gamma )^{91}\)Nb reaction was used to populate excited states in \(^{91}\)Nb. The rotation of the angular distribution of the 357 keV gamma-transition from the 21/2\(^+\) state was measured in an external magnetic field. The IPAD method was used. By applying \(\tau = (1.33 \pm 0.14)\) ns for the lifetime of the 21/2\(^+\) state at 3467 keV, the value of the \(g\)-factor 1.18 \(\pm \) 0.18 was derived.
A method based on the utilization of an electromagnetic field is proposed for the detection of gravitation radiation in the metre range with fluxes of the order of 10\(^{-20}\) W/m\(^2\).
