Expectation values of the neutral chromium radius

Abstract

Neutral Chromium (Cr I) is an important element in many laboratory plasma applications. In this work, expectation values of the radius for Cr I are calculated. These atomic data are calculated with three different atomic codes: Cowan code using the Hartree-Fock Relativistic approximation, SUPERSTRUCTURE and AUTOSTRUCTURE codes using scaled Thomas-Fermi-Dirac-Amaldi potential. Relativistic corrections are introduced according to the Breit-Pauli approach. The 3d54s, 3d44s2, 3d54d, 3d54p and 3d44s4p configurations are included to obtain the expectation values of radius of Cr I and compared with available data. The novelty of our work is to obtain new values of < 1r >, < r >, and < r2 > for the configuration of 4p and 4d and the values of < r3 > for all orbitals configurations considered in this work.