Sievert chamber
Encyclopedia
A Sievert chamber is a type of ionization chamber
Ionization chamber
The ionization chamber is the simplest of all gas-filled radiation detectors, and is used for the detection or measurement of ionizing radiation...

 used in radiation dose measurements. It was invented by Professor Rolf Maximilian Sievert
Rolf Maximilian Sievert
Professor Rolf Maximilian Sievert was a medical physicist whose major contribution was in the study of the biological effects of radiation.Professor Sievert was born in Stockholm, Sweden...

 in Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

in the years 1920-40.
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