Effective Charge of Heavy Ions in Various Media

Abstract

Effective-charge data for heavy ions, as obtained from range-energy curves in oxygen, argon, aluminum, and nickel, are analyzed in terms of a Fermi-Thomas representation of the atom. It would appear that this gives a superior parametrization in terms of nuclear charge. In addition, it appears to properly account for the increase in charge observed for metallic as compared to gaseous absorbers.