Interpretation of the isotope shifts in the arc spectrum of xenon
From the experimental results of Jackson & Coulombe (1974) and Vetter (1970) in the arc spectrum of xenon, the isotope shifts of 30 levels in the low configurations 5p56s, 5p56p, 5p55d and 5p57p are obtained, for the mass numbers 136, 134, 132, 130 and 128. A parametric study of these shifts for each isotope is made, with 3 parameters for the even levels and 6 for the odd levels. Following the conclusions of Jackson & Coulombe (1974), the respective contributions of mass- and field-effects to the shifts of the levels and to the parameters are evaluated from King diagrams. The ab initio values obtained for the parameters through the Hartree-Fock nonrelativistic and relativistic methods show a satisfactory agreement with the experimental values.