Über Anwendungsmöglichkeiten der PIXE-Methode in der Luftstaubanalytik

Application of PIXE to the Element-Analysis of Airborne Dust The method of particle-induced X-ray emission (PIXE) is used in various fields of trace element analysis. Because of the small sample masses needed for PIXE it is shown, that this method in combination with time sequential sampling is able to measure short-term variations of trace element concentrations in the air.     

Sinn und Möglichkeiten der Theoretischen Physik. Zum 300. Jahrestag von Newtons „Philosophiae Naturalis Principia Mathematica”︁

The Meaning and Abilities of Theoretical Physics The Newtonean principles and — derived from them — the congnition of the exixtence of elementary constants according to Planck, Einstein and Bohr increasingly prove to be a strong base not only of physics and its apllication in technology but also of each kind of “exact” sciences in the broadest sense of the word. Since Newton the clarification of concepts with regard so their physical takes place in close connection with the development of mathematical methods. This combination proves to be further productive and ensures the progress of physics an of the “exact” sciences. Most likely all problems which may be of importance in the realm of life can be treated successfully — adequate expenditure taken for granted — with the existing fund of knowledge and methods. The connection between law and accident resting on reality proves to be a relation of complementarity (“there is no absolute accident”). This becomes evident in all branches in all branches of physics, not only in thermodynamics and quantum physics, and can be treated already on the level of the Newtonean principles and elementary constants. Theoretical physics as initiated by newton was designed to comprise all parts of nature. About that there is no contrast between classical physics and quantum physics. It is only a matter of differentiation with regard to the different physical contents and the appropriate mathematical methods, dependent of course on the choice problems. Theoretical physics represents a generally available concentration of the reliable knowledge of physics, which is at the same time the foundation of the “exact” sciences. In this way theoretical physics is the means of communication within the cooperation necessary for the solution of the great complex tasks of science and technology.     

Friedrich Möglich - sein Beitrag zum Aufbau der Physik in der DDR. Friedrich Möglich - langjähriger Mitherausgeber und Chefredakteur der „Annalen der Physik”︁

Friedrich Möglich - His Contributions to the Formation of Physics in GDR Friedrich Möglich a student of Max von Laue and Erwin Schrödinger took over as editor in chief of “Annalen der Physik” in 1947.     

Mössbauer charge density in I

The electronic charge density at ¹²⁹I^- is calculated from the Hartree-Fock wave functions in the lithium iodide lattice and from that it is found that the charge density varies approximately as the inverse seventh power of the interatomic distance.     

Bestimmung der Ionendichte in strömenden Hochdruckplasmen mittels elektrischer Staupunktsonden

An electrical stagnation point probe used to measure ion densities of flowing high pressure plasmas (p = 10⁵ Pa) was developed. The experimental results of a probe operating in the sheath — convection regime confirm the validity of the used theory according to the shape of the characteristic and the measured ion density compared with spectroscopical values. The deviation between both techniques is less than a half order of magnitude.