Abstract

The atomic absorption cross section of potassium has been measured between 580 and 1000 Å. The region between 685 and 1000 Å showed continuous absorption and the values around 1000 Å were consistent with those obtained previously. In the region between 580 and 685 Å several autoionization lines were observed, in particular two strong lines corresponding to the ${\left(3\mathcal{p}\right)}^{6}4s\to {\left(3\mathcal{p}\right)}^5{\left(4s\right)}^2{}^2{P}_{\frac{3}{2},\frac{1}{2}}$ transitions. This spectral region was studied photoelectrically at a bandwidth of 0.37 Å and photographically at 0.075 Å. Curves and tables are presented of the atomic absorption cross sections of potassium versus energy from the series limit to 580 Å, and a comparison is made between these results and recent theoretical estimates. An attempt was made to fit Fano–Beutler profiles to the measured line shapes of the ${\left(3\mathcal{p}\right)}^{6}4s\to {\left(3\mathcal{p}\right)}^5{\left(4s\right)}^2{-}^2{P}_{\frac{3}{2},\frac{1}{2}}$ transitions and the resulting line-shape parameters are given. The sum of the oscillator strengths of these transitions was found to be 0.147.

© 1967 Optical Society of America

Atomic Absorption Cross Sections of Lithium and Sodium Between 600 and 1000 Å*

R. D. Hudson and Virginia L. Carter
J. Opt. Soc. Am. 57(5) 651-654 (1967)

Absorption Cross Sections of Argon and Methane between 600 and 170 Å

Om Prakash Rustgi
J. Opt. Soc. Am. 54(4) 464-466 (1964)

Bandwidth Dependence of Measured uv Absorption Cross Sections of Argon*

Robert D. Hudson and Virginia L. Carter
J. Opt. Soc. Am. 58(2) 227-232 (1968)

Relative photoionization cross section of atomic selenium between 800 and 1400 Å

A. M. Cantú, M. Mazzoni, and Y.N. Joshi
J. Opt. Soc. Am. 72(10) 1363-1366 (1982)

Absorption Spectrum of the Argon Atom in the Vacuum-Ultraviolet Region

Kouichi Yoshino
J. Opt. Soc. Am. 60(9) 1220-1229 (1970)