1. NAME AND TITLE

E-DEP-1: Heavy Ion Energy Deposition Code System.

Version P5.00, packaged by RSIC December 1986, employees improved stopping powers and includes several minor corrections and improvements from the previous CDC version.

2. CONTRIBUTOR

Naval Research Laboratory, Washington, D.C.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 77; Vax.

4. NATURE OF PROBLEM SOLVED

E-DEP-1 calculates the distribution of energy deposited in collisions for a beam of heavy ions coming to rest in an amorphous target material of up to six atomic components.

5. METHOD OF SOLUTION

The stopping power cross sections for elastic atomic collisions in Version P5.00 are those of Wilson, et al. (1) based on a realistic interatomic potential. The original program uses the inelastic stopping law of Lindhard, et al.(2). In the present work, the phenomenological fit given by Land and Brennan (3) partially replaces this approximation.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

The sample case executes in less than a minute wall clock time on the Vax 8600.

8. COMPUTER HARDWARE REQUIREMENTS

This version of E-DEP-1 runs on Vax 11/780 and 8600 computers.

9. COMPUTER SOFTWARE REQUIREMENTS

E-DEP-1 runs under the VMS operating system using both DEC Fortran 66 and Fortran 77 compilers. RSIC ran the test case using VMS Version 4.5 and Fortran 77 compiler release 4.5

10. REFERENCES

a. Included in the package:

C. M. Davisson and I. Manning, "New Version of the Energy-Deposition Code E-DEP-1: Better Stopping Powers," NRL 8859 (October 6, 1986).

b. Background information:

(1) W. D. Wilson, L. G. Haggmark, and J. P. Biersack, Physics Review B15, 2458 (1977).

(2) J. Lindhard, M. Scharff and H. E. Schiott, Danske Videnskab. Selskab 33 No. 14 (1963).

(3) D. J. Land and J. G. Brennan, Atomic Data and Nuclear Data Tables 22, 235 (1978).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document (10.a) and one (1.2MB) DOS diskette which contains source code and sample problem input.

12. DATE OF ABSTRACT

November 1981; reviewed March 1982, January 1985; revised December 1986.