Laspe - A Subroutine For Generating Straggling Distributions For Positrons And Electrons

Computer codes used for analysis of data from high energy electron scattering experiments generally use the Rutherford cross-section based distribution derived by Landau to calculate the energy lost by electrons due to straggling. We have developed a FORTRAN program which evaluates straggling distributions incorporating Moller and Bhabha cross-sections. In e- scattering analysis, this program can be used to evaluate the precision of existing Rutherford-based distributions. In addition, the calculation of the e+ straggling distribution is relevant to the analysis of experiments such as those investigating dispersive effects in nuclear electromagnetic processes by comparing results obtained from e- and e+ scattering from identical nuclei. In addition to a full straggling distribution, the output includes the parameters which characterize the distribution as well as a table of integrals of the distribution.