Wayne State University, Department of Physics and Astronomy

Colloquium

Thursday 22 April 1999

Electron Spin Filters: Was Bohr Wrong?

Tim Gay, University of Nebraska-Lincoln

In 1928 Bohr declared that it is impossible to use a Stern-Gerlach magnet to filter beams of electrons into their separate spin components. A proof of this assertion was presented by Pauli at the 1932 Solvay Conference on Magnetism. Yet recent experiments done by Dehmelt's group in Washington seem to cast doubt on Bohr's edict. This problem will be analyzed, and a counter-example to Pauli's proof presented. A new type of electron spin filter, recently demonstrated in our laboratory, will also be discussed.

Colloquium starts at 16:00 in Room 245 and lasts about 1 hour including questions. Refreshments are served at 15:30 in room 245.

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