Zur Wahl des Energie-Impuls-Tensors des Klein-Gordon-Feldes

The interpretation of the Klein Gordon tensor as energy momentum tensor turns out to be physically inconsistent. Therefore we propose a different tensor.     

Zur Definition der Drehimpulseigenfunktionen in der Vektormesontheorie

There are three possibilities for the introduction of angular momentum eigenfunctions in the vector-meson-theory: 1. Multipole fields, 2. orbital angular momentum eigenfunctions, 3. helicity eigenfunctions. We shall define these functions by eigenvalue equations and present their mutual relationship. In analogy to the usual momentum quantization we may quantize the field with respect to each of the three systems of angular momentum eigenfunctions.     

Zur Entdeckungsgeschichte des Radons

The radioactivity of the noble gas radon and its short-life daughter products as the essential part of natural radioactivity have gained in topically in the last years. For this reason the history of discovery of radon has been summed up. This history is one part of the early research about radioactivity. From the appearance of induced radioactivity the way leads to the discovery of thorium emanation by Rutherford and of radium emanation by Dorn. Finally, the article deals with the detection of radon in the air by Elster and Qeitel and of the radon in well water and springivaler by Thomson because only these results have opened the way for the therapeutical usage of radon.