Laser-Plasma Spectra of Highly Ionized Fluorine

Abstract

Lines between 11.3 A and 17.2 A of lithium-like, helium-like, and hydrogen-like fluorine have been observed in spectra of laser-produced plasmas. These lines include nine members of the Lyman series of F IX; eight members of the principal series of F VIII; and satellite lines arising from doubly excited configurations of F VII and F VIII. Similar satellite lines of the abundant solar elements have been identified in soft X-ray spectra of solar flares. A wavelength list of fluorine lines is given, and physical conditions in the plasma are discussed. Subject headings: flares, solar - line identifications - plasmas - spectra, laboratory - spectra, X-ray