Rayleigh scattering of X-ray and γ-ray by 2p electrons in ions and neutral atoms Adrian Costescu, Maria Luiza Mitu and Sever Spânulescu Eur. Phys. J. D, 70 10 (2016) 204 Published online: 13 October 2016 DOI: 10.1140/epjd/e2016-70024-x