The vapor pressure of potassium has been measured in absorption using a cw
tunable laser and calibrated against the accurate radiative lifetime of the
4s—4p doublet of potassium. An accurate
value of 20,850 ± 30 cal/mol for the heat of vaporization (from the liquid
phase) at the melting point was determined.
© 1983 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.