Delta function calculations using variational Monte Carlo

Using the Schmidt and Moskowitz wavefunctions, we calculate the one- and tw o-electron delta functions of the neutral atoms He-Ne as well as selected a nions and cations. In the process, we examine several ways of evaluating th ese properties, and discuss the relative merits of each. We also investigat e the use of three different methods of generating configurations, and how they effect the sampling of these and other expectation values. (C) 1999 El sevier Science B.V. All rights reserved.