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Rudolf Ladenburg

Rudolf Ladenburg German atomic physicist

German atomic physicist
Rudolf Ladenburg
The basics

Quick Facts

Intro German atomic physicist
Was Scientist Physicist Educator
From Germany United States of America
Gender male
Birth 6 June 1882, Kiel, Schleswig-Holstein, Germany
Death 3 April 1952, Princeton, Mercer County, New Jersey, U.S.A. (aged 69 years)
Star sign GeminiGemini
The details

Biography

Rudolf Walter Ladenburg (June 6, 1882, Kiel – April 6, 1952, Princeton, New Jersey) was a German atomic physicist. He emigrated from Germany as early as 1932 and became a Brackett Research Professor at Princeton University. When the wave of German emigration began in 1933, he was the principal coordinator for job placement of exiled physicist in the United States.

Background

Ladenburg was the son of the Jewish chemist Albert Ladenburg, ordinarius professor of chemistry at the University of Kiel (1874–1899) and then at the University of Breslau (1899–1909). He was a non-practicing Jew and an atheist.

Education

From 1900 to 1906, Ladenburg studied at the Ruprecht-Karls-Universität Heidelberg, the Universität Breslau, and the Ludwig-Maximilians-Universität München. He received his doctorate under Wilhelm Röntgen at Munich.

Career

After completion of his Habilitation, Ladenburg became a Privatdozent at Breslau and in 1921 an ausserordentlicher Professor (extraordinarius professor) there. In 1924, he took an appointment at the Friedrich-Wilhelms-Universität (today, the Humboldt-Universität zu Berlin) along with becoming a scientific member of the Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie (KWIPC, Kaiser Wilhelm Institute of Physical Chemistry and Electrochemistry) of the Kaiser-Wilhelm Gesellschaft (KWG, Kaiser Wilhelm Society).

Ladenburg went to the United States as early as 1930, where he became a Brackett Research Professor at the Palmer Physics Laboratory, Princeton University. When the emigration wave from Germany began in April 1933, Ladenburg was the principal coordinator for the employment of exiled physicists in the United States. He retired from Princeton in 1950.

Articles

  • Rudolf Ladenburg and Stanislaw Loria Nature, Anomalous Dispersion of Luminous Hydrogen Volume 79, 7-7 (5 November 1908)
  • Rudolf Ladenburg Die quantentheoretische Bedeutung der Zahl der Dispersionelektronen, Z. Phys. Volume 4, Number 4, 451-468 (1921). Received on 8 February 1921. Institutional affiliation: Breslau, Physikal. Institut der Universität. English translation: The quantum-theoretical number of dispersion electrons in B. L. van der Waerden Sources of Quantum Mechanics (Dover, 1968) pp. 139 – 157.
  • R. Ladenburg and F. Reiche Dispersionsgesetz und Bohrsche Atomtheorie, Die Naturwissenschaften , Volume 12, Issue 33, pp. 672-673 (1924)
  • Hans Kopfermann and Rudolf Ladenburg Elektrooptische Untersuchungen am Natriumdampf. (Anomale elektrische Doppelbrechung; Starkeffekt an der Resonanzstrahlung), Annalen der Physik, Volume 383, Issue 23, pp.659-679 (1925)
  • Hans Kopfermann and Rudolf Ladenburg Untersuchungen über die anomale Dispersion angeregter Gase II Teil. Anomale Dispersion in angeregtem Neon Einfluß von Strom und Druck, Bildung und Vernichtung angeregter Atome, Zeitschrift für Physik Volume 48, Numbers 1-2, pp. 26-50 (January, 1928). Received 17 December 1927. Institutional affiliation: Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie, Berlin-Dahlem.
  • H. Kopfermann and R. Ladenburg Experimental Proof of ‘Negative Dispersion’, Nature Volume 122, 438-439 (22 September 1928)
  • R. Ladenburg and S. Levy Untersuchungen über die anomale Dispersion angeregter Gase VI. Teil: Kontrollversuche für den Nachweis der negativen Dispersion: Absorption, anomale Dispersion, Intensitätsverteilung und Intensität verschiedener Neonlinien Zeitschrift für Physik Volume 65, Numbers 3-4. pp. 189-206 (March, 1930). Received 12 August 1930. Institutional affiliation: Kaiser-Wilhelm Institut für physikalische Chemie und Elektrochemie, Berlin-Dahlem.
  • Rudolf Ladenburg Dispersion in Electrically Excited Gases Rev. Mod. Phys. Volume 5, 243 - 256 (1933). The author was cited as being at Princeton University.
  • Rudolf W. Ladenburg Light absorption and distribution of atmospheric ozone, Journal of the Optical Society of America, Volume 25, Issue 9, p.259 (1935)
  • Max Born, R. Fürth, and Rudolf Ladenburg Long Duration of the Balmer Spectrum in Hydrogen, Nature Volume 157, pp. 159-159 (09 February 1946). Institutional affiliations: Born and Fürth were identified as being in the Department of Mathematical Physics, The University, Edinburgh, and Ladenburg was identified as being in the Palmer Physical Laboratory, Princeton University, Princeton, New Jersey.

Books

  • Rudolf Walter Ladenburg Planck's elementares Wirkungsquantum und die Methoden zu seiner Messung (Hirzel, 1921)
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