1. NAME AND TITLE
XRAY_AAC: X-ray Attenuation and Absorption Calculations.
UPDATE_COEFF: Convert data library to binary indexed file.
AAC_1: Application program to demonstrate calling XRAY_AAC.
AAC_2: Interactive application program to call XRAY_AAC.
AAC_3: Interactive application program to provide easy access to Function
ELEMENTS.DAT: Subset of DLC-99/HUGO including attenuation and absorption coefficients.
Boeing Aerospace Company, Seattle, Washington.
3. CODING LANGUAGE AND COMPUTER
Fortran 77; VAX.
4. NATURE OF PROBLEM SOLVED
This point-source, polychromatic, discrete energy X-ray transport and energy deposition code
system calculates first-order spectral estimates of X-ray energy transmission through slab materials and
the associated spectrum of energy absorbed by the material.
5. METHOD OF SOLUTION
X-ray source spectra may be internally generated and normalized (Kramer or Planck spectrum),
read from data files, or read from an electronic library. Virtually any material consisting of the first
100 atomic elements may be specified as a shield or absorber using a common symbolic format. The
calculated spectra may be selectively written to data files which in turn may be used as input to further
calculations. One aspect of this software that is believed unique is its ability to parse chemical
compounds and alloys that are entered in a conventional symbolic format and calculate the relative
mass of the constituent elements.
6. RESTRICTIONS OR LIMITATIONS
Because this software is written in Vax Fortran, which is a superset of ANSI Fortran 77, and takes
appropriate advantage of VMS system routines and run-time library functions, its transportability is
7. TYPICAL RUNNING TIME
The programs take only a few seconds to execute interactively.
8. COMPUTER HARDWARE REQUIREMENTS
The codes run on VAX 11/750 or VAX 8600 computers.
9. COMPUTER SOFTWARE REQUIREMENTS
The codes were developed using Vax/VMS Version 4.5 and Vax Fortran Version 4.6.
A. MacArthur, "XRAY_AAC: X-ray Attenuation and Absorption Calculations," Boeing
Aerospace Company, Seattle, Washington (Unpublished document 1987).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) diskette in compressed DOS files.
12. DATE OF ABSTRACT
KEYWORDS: BEAM TRANSPORT; ENERGY DEPOSITION; GAMMA-RAY SOURCE; GAMMA-RAY; INTERACTIVE; X-RAY