Electron-potassium spin-exchange cross section
- 11 November 1975
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 8 (16), 2615-2619
- https://doi.org/10.1088/0022-3700/8/16/019
Abstract
A spin-exchange optical-pumping experiment to measure the electron-potassium spin-exchange cross section in a He buffer gas is reported. Electrons are polarized by spin-exchange collisions with optically pumped K atoms. The value of the spin exchange cross section at thermal energy is measured to be (6.8+or-1)*10-14 cm2. The electron-spin resonance linewidths are measured over the temperature range 85-120 degrees C. They fit the theoretical temperature dependence Delta nu (T) varies as P(K)T-32/, indicating that the width of the free electron resonance is caused mainly by spin-exchange collisions.Keywords
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