MEASUREMENT AND CALCULATION OF IONISATION ENERGIES OF ATOMS AND ATOMIC IONS
PETER F. LANG *
Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK
BARRY C. SMITH
Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK
*Author to whom correspondence should be addressed.
Abstract
This work describes briefly how ionisation energy can be measured by analysis of optical spectra. A detailed review of sources of both calculated and experimental data is provided. Particulars of simple equations for calculating ionisation energies of multielectron ions are discussed. Trends in ionisation energies especially of transition elements and lanthanides are examined.
Keywords: Ionisation energies, relativistic corrections, screening constants, optical spectra