# QEDMOD: Fortran program for calculating the model Lamb-shift operator

Published: 15 November 2017| Version 1 | DOI: 10.17632/ct869v4gxn.1

Contributors:

V. M. Shabaev,

I. I. Tupitsyn,

V. A. Yerokhin

## Description

We present Fortran package QEDMOD for computing the model QED operator h^QED that can be used to account for the Lamb shift in accurate atomic-structure calculations. The package routines calculate the matrix elements of h^QED with the user-specified one-electron wave functions. The operator can be used to calculate Lamb shift in many-electron atomic systems with a typical accuracy of few percent, either by evaluating the matrix element of h^QED with the many-electron wave function, or by adding h^QED to the Dirac–Coulomb–Breit Hamiltonian.