Reference

Surface and Interface Analysis, vol.17, 911-926 (1991)

"Calculations of Electron Inelastic Mean Free Paths"

S.Tanuma
Analysis Research Center, Nippon Mining Company Ltd., 3-17-35 Niizo-Minami, Toda, Saitama 335, Japan

C.J.Powell and D.R.Penn
National Institute of Standards and Technology, Gaithersburg, MD 20899, USA