Everything about Hendrik Anthony Kramers totally explained
Hendrik Anthony Kramers (
Rotterdam,
February 2,
1894 –
Oegstgeest,
April 24,
1952) was a
Dutch physicist, who was generally known by the first name
Hans. Hans was the son of Hendrik Kramers, a
physician, and Jeanne Susanne Breukelman. On
October 25 1920 he was married to Anna Petersen. They had three daughters and one son.
In 1912 Hans finished
secondary education (in Dutch: HBS) in Rotterdam, and studied
mathematics and
physics at the
University of Leiden, where he obtained a master's degree in 1916.
Kramers wanted to obtain foreign experience, but his first choice,
Max Born in Göttingen, wasn't reachable because of the first world war. Because Denmark was neutral in this war, as was The Netherlands, he travelled (by ship, overland was impossible) to
Copenhagen, where he visited unannounced the then still relatively unknown
Niels Bohr.
Bohr took him on as a PhD student and Hans prepared his dissertation under Bohr's direction.
Although Kramers did most of his doctoral research (on intensities of atomic transitions) in Copenhagen, he obtained his formal Ph.D. in Leiden (on
May 8 1919).
After working for almost ten years in Bohr's group and becoming an associate professor at the university of Copenhagen, Kramers left Denmark in 1926 and returned to his native land. He became a full professor in theoretical physics at the university of Utrecht. In 1934 he left Utrecht and succeeded
Ehrenfest in Leiden. From 1931 until his death he held also a cross appointment at the
Delft University of Technology.
Kramers was one of the founders of the
Mathematisch Centrum in Amsterdam.
He won the
Lorentz Medal in 1947 and
Hughes Medal in 1951.
Kramers lends his name to the
Kramers crater on the
Moon, the
Kramers-Heisenberg formula, the
Wentzel-Kramers-Brillouin approximation, the
Kramers-Kronig relation,
Kramers-Wannier duality, the Kramers model for polymer chains,
Kramers-Anderson superexchange, and
Kramers' degeneracy theorem.
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