1. NAME AND TITLE
DIPHO: Monte Carlo Gamma-Ray Code SystemInfinite Medium, Monoenergetic and
Isotropic Point Source.
Laboratoire Central et Ecoles de L'Armament, Ministere des Armees, Fort de Montrouge,
Arcueil (Val de Marne), France, through the OECD NEA Data Bank, Gif-sur-Yvette, France.
3. CODING LANGUAGE AND COMPUTER
FORTRAN IV; IBM 360/65/75/91.
4. NATURE OF PROBLEM SOLVED
DIPHO is designed as a differential energy flux calculation in a photon scattering problem.
The point photon source is monoenergetic and isotropic. The absorbing medium is assumed to be
infinite and homogeneous.
5. METHOD OF SOLUTION
The solution to the Boltzmann equation is determined by the Monte Carlo method with
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
Estimated running time of the packaged sample problem on the IBM 360/65: from one half to
two hours for particles, depending on the value of C.
8. COMPUTER HARDWARE REQUIREMENTS
DIPHO was originally designed for the IBM 7040. The packaged version is operable on the
IBM 360 with standard equipment. Only 16K of memory is required.
9. COMPUTER SOFTWARE REQUIREMENTS
The code may be compiled and executed on the IBM 360/65/75/91 FORTRAN IV Monitor
System with standard input-output devices.
"Photon ScatteringMonoenergetic Isotropic Point SourceInfinite Medium,"' Note 9, Nuclear
Shielding Calculations Study No. 07-1, Defense Ministry, Ministerial Defense Delegation,
Technical Directing of Ground Defense, Central Defense Laboratory (November 1965) (ORNL-tr-2349).
11. CONTENTS OF CODE PACKAGE
Included are the referenced and one (1.2MB) DOS diskette which contains the source code and
sample problem input and output.
12. DATE OF ABSTRACT
August 1971; revised August 1982.
KEYWORDS: GAMMA-RAY; MONTE CARLO; INFINITE MEDIUM