Hans Heinrich Euler
Hans Heinrich Euler (b. 6 October 1909 in Merano, d. 1941) was a German physicist. He received his PhD in 1935 at the University of Leipzig under Werner Heisenberg with a thesis "Über die Streuung von Licht an Licht nach der Diracschen Theorie" (On the scattering of light by light based on Dirac's theory). 

Euler was the first physicist who was able to show that Paul Dirac's introduction of the positron opens the possibility that photons in electron-positron pair production scatter with each other and calculated the cross section for this process in his PhD thesis. 

Based on the observations of Helmuth Kulenkampff, Euler and Heisenberg were able to calculate an improved figure for meson decay time. They also introduced the Euler–Heisenberg Lagrangian that laid the basis for the quantitative treatment of vacuum polarization.

Euler died in a reconnaissance flight over the Sea of Azov, during World War II. He had joined the Luftwaffe a few months earlier.
Q131605
Merano
LOC
Q154804
University of Leipzig
ORG
Q40904
Werner Heisenberg
PER
Q47480
Paul Dirac
PER
Q3229
positron
Concept
Q3198
photon
Concept
Q5709840
Helmuth Kulenkampff
PER
Q102742
meson
Concept
Q5409007
Euler–Heisenberg Lagrangian
UNK
Q1886497
vacuum polarization
UNK
Q35000
Sea of Azov
LOC
Q362
World War II
EVE
Q2564009
Luftwaffe
Concept
Q90579
Hans Heinrich Euler
PER
1909-10-06T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
6 October 1909
DATE
1941-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1941
DATE
1935-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1935
DATE
place of birth
date of death
educated at
doctoral advisor