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 3d(5)4s, 3d(4)4s(2), 3d(5)4d, 3d(5)4p and 3d(4)4s4p 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 < 1/r >, < r >, and < r(2) > for the configuration of 4p and 4d and the values of < r(3) > for all orbitals configurations considered in this work.