A second look at the excitation mechanism of the He-Hg/+/ laser

Details A second look at the excitation mechanism of the He-Hg/+/ laser A second look at the excitation mechanism of the He-Hg/+/ laser

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apphl..27..610k&link_type=abstract

Applied Physics Letters, vol. 27, Dec. 1, 1975, p. 610-612. NSF-supported research;

Physics

14

Atomic Excitations, Charge Transfer, Continuous Wave Lasers, Gas Lasers, Mercury Vapor, Decay Rates, Helium Ions, Laser Modes, Spontaneous Emission, Scattering In Highly Excited States, Atomic, Molecular, Ion, And Heavy-Particle Collisions

Scientific paper

We have resolved the controversy in the literature concerning the dominant excitation mechanism of the CW mercury ion laser by obtaining the first direct experimental proof that thermal energy charge transfer is the dominant formation process for the excited 7p 2P terms of Hg II which support CW laser oscillation of 6150 and 7944 A. Using a floating double probe we have monitored directly the helium ion density versus time and confirmed its one-to-one correspondence with the measured decay of spontaneous emission from the Hg II 7p 2P levels. The measured value of He(+)-Hg cross section is 1.3 times 10 to the minus 14th sq cm.

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