Spin-exchange-induced circularly polarized molecular fluorescence.
We have measured the circular polarization of light emitted from both atomic H and molecular H2 after bombarding H2 with longitudinally polarized electrons. For both atomic and molecular fluorescence near threshold we observe a circular polarization as great as 10% of the electron polarization. This represents the first direct observation of spin transfer in electron-molecule collisions.
Green
A S
AS
Behlen Laboratory of Physics, University of Nebraska, Lincoln, Nebraska 68588-0111, USA.
Gallup
G A
GA
Rosenberry
M A
MA
Gay
T J
TJ