Revised absolute absorption cross sections of CaI at 1886.5 and 1765.1 AA
- 1 October 1972
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 5 (10), L217-L219
- https://doi.org/10.1088/0022-3700/5/10/007
Abstract
The photo-ionization cross sections of CaI are measured photo-electrically at 1886.5 and 1765.1 AA; hooks of the 4226.78 AA resonance line are used to establish number densities. The resulting values for the absorption cross sections of 52 and 71*10-18 cm2 respectively are larger by a factor of 2.2 than previously published values based on vapour pressures.Keywords
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