CCC-0050 LRSPC.

1. NAME OR DESIGNATION OF PROGRAM:  LRSPC.

3. DESCRIPTION OF PROGRAM OR FUNCTION

The LRSPC program is designed to estimate the energy loss, due to ionization and excitation, and the range of charged particles passing through matter. The code treats protons in elements or mixtures composed of elements with atomic numbers ranging from 1 to 100. The results for protons are generally valid from 1 MeV to 100 GeV. The code may be extended to treat other charged particles such as muons, pions, hyperons, deuterons, tritons and alphas by changing the particle mass, charge  and range at 2 MeV.

4. METHOD OF SOLUTION

Stopping power is calculated from the Bethe-Bloch equation with shell and density corrections included. Range is calculated by integrating the reciprocal of the stopping power from an initial value at 2 MeV. The K-shell correction is taken from Walske's data. The L-shell and higher shell corrections are adjusted to fit low energy measurements fro 30 elements. The density correction is calculated by a method similar to that of Sternheimer, differing chiefly in the large number of electron shells considered.
LRSPC computes improved proton range and stopping power data for use in the proton penetration code, LPPC (CCC-0051). It is packages separately and may be requested independently.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Number of elements in mixture   Atomic number of element        Number of energy points