engleski

Collisional excitation transfer between lithium isotopes

Excitation transfer between the 3S1/2 states of the lithium isotopes 6Li and 7Li is measured in a thermionic diode. The 3S level is excited by off- resonant two-photon transitions with a single mode ew laser. The relative densities of the directly excited and collisionally populated levels are probed by further laser excitation to the 12P levels. An energy transfer cross section of 585 Å ; ; 2± ; ; 160 Å ; ; 2 is found at the experimental temperature of about 850 K. A simple semiclassical calculation yields a cross section of 450 Å ; ; 2.

excitation transfer ; lithium

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