Hans Boersch
Hans Boersch (born June 1, 1909 in Berlin ; † June 9, 1986 in Eggenfelden ) was a German physicist.
life and work
Boersch studied physics from 1930 at the Technical University of Charlottenburg and from 1933 at the University of Vienna. There he received his doctorate in 1935 with the thesis "Determination of the structure of some simple molecules with electron interference". He then became a research associate in the AEG research laboratory in Berlin. In 1941 he began working as an assistant at the I. Chemical Institute of the University of Vienna , where he set up the laboratory for structural research and hyper microscopy. He did his habilitation in 1942 with a thesis on electron diffraction phenomena.
After intermediate stops at the University of Innsbruck and from 1946 at the Institut des Recherches Scientifiques in Tettnang ( Württemberg ), he switched to the Physikalisch-Technische Bundesanstalt in Braunschweig in 1948 . At the same time he was offered an honorary professorship at the Technical University of Braunschweig , where he later discovered the anomalous energy distribution in intense electron beams , the “ Boersch effect ” named after him . This energy distribution is a limiting factor for the resolving power of electron microscopes . In 1954 Boersch became head of the I. Physics Institute at the TU Berlin .
Together with Sauerbrey and Radeloff, at the physics conference in Wiesbaden in 1960, he gave an initial interpretation of the gray-white " lily field radiation " observed in X-ray tubes by Julius Edgar Lilienfeld in 1919 , which had since been forgotten.
Boersch set up one of the first working groups in Germany to deal with lasers at the Optical Institute of the TU Berlin. His doctoral students Horst Weber and Gerd Herziger built their own solid-state lasers and He-Ne lasers in 1962 .
He and his wife were buried in the New Cemetery in Ulm in Department 72, grave site number 78.
Fonts
- Observation of Fresnel electron diffraction phenomena with a new device. Habilitation thesis. University of Vienna 1942.
Honourings and prices
- 1941: Silver Leibniz Medal of the Prussian Academy of Sciences (together with other pioneers of electron microscopy)
- September 22, 1975: Honorary membership in the German Society for Electron Microscopy
literature
- Heinz Niederig : Obituary for the pioneer of electron microscopy: Hans Boersch 1909-1986 , Optik 75 (1987), pages 172 to 174
- Hans Christian Förster: Experimental Physics in the “Circus Boersch” - The laser researcher Hans Boersch always had a suitcase in Berlin , in: TU intern, number 6 (June 2011), page 16, online version
Web links
- Literature by and about Hans Boersch in the catalog of the German National Library
Individual evidence
- ↑ Hans Boersch, C. Radeloff, G. Sauerbrey: About the visible and ultraviolet radiation released on metals by electrons. In: Journal of Physics A Hadrons and Nuclei. 165, No. 4, August 1961, pp. 464-484 doi : 10.1007 / BF01381902 .
- ↑ Hans Boersch, C. Radeloff, G. Sauerbrey: Experimental detection of transition radiation. In: American Physical Society (Ed.): Phys. Rev. Lett. 7, No. 2, July 15, 1961, pp. 52-54 doi : 10.1103 / PhysRevLett.7.52 .
- ^ Letter to the editor: Hans Boersch - found! How a TU alumnus helps clear up TU history, Friday, October 14, 2011, accessed online on February 1, 2012
- ↑ The honorary members of the DGE (PDF; 127 kB)
| personal data | |
|---|---|
| SURNAME | Boersch, Hans |
| BRIEF DESCRIPTION | German physicist |
| DATE OF BIRTH | June 1, 1909 |
| PLACE OF BIRTH | Berlin |
| DATE OF DEATH | June 9, 1986 |
| Place of death | Eggenfelden |