last modified: 18-JUL-2002 | catalog | categories | new | search |

NEA-1239 SFERXS.

SFERXS, Photoabsorption, Coherent, Incoherent Scattering Cross-Sections Function for Shielding

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1. NAME OR DESIGNATION OF PROGRAM:  SFERXS.
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2. COMPUTERS
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Program name Package id Status Status date
SFERXS NEA-1239/01 Tested 18-JUL-2002

Machines used:

Package ID Orig. computer Test computer
NEA-1239/01 IBM PC PC Pentium III
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3. DESCRIPTION OF PROGRAM OR FUNCTION

The use of electromagnetic radiation cross-sections in radiation shielding calculations and more generally in transport theory applications actually requires an interpolation between values which are tabulated for certain values  of the energy.
In order to facilitate this process and to reduce the computer memory requirements, we have developed, by a least squares method, a set of functions which represents the cross-sections for the photoelectric absorption, the coherent (Rayleigh) and the incoherent (Compton) scattering (1).
For this purpose we have accepted as true values the ones tabulated by Storm & Israel (2) for the photoeffect, by Hubbell et Al. (3) for the incoherent scattering and by Hubbell & Overbo (4) for the coherent scattering.
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4. METHOD OF SOLUTION:
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:  Interactive program.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NEA-1239/01 18-JUL-2002 Tested at NEADB
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10. REFERENCES

- E. Storm and H.I. Israel
  Photon Cross Sections from 1 KeV to 100 MeV for Elements z = to
  100,
  In Nuclear Data Tables, 1970, A. 7, pp. 565-681.
- J.H. Hubbell et Al.
  Atomic form Factors, Incoherent Scattering Functions, and Photon
  Scattering Cross Sections,
  J. Phys. Chem. Ref. Data, 1975, Vol. 4, No. 3, pp. 471-538.
- J.H. Hubbell and I. Overbo
  Relativistic Atomic form Factors and Photon Coherent Scattering
  Cross Sections,
  J. Phys. Chem. Ref. Data, 1979, Vol. 8, No. 1, pp. 69-103.
NEA-1239/01, included references:
- F. Legarda, O. Mtz. de Lafuente and M. Herranz:
  SFERXS - Abstract and User's Guide.
- F. Legarda, O. Mtz. de Lafuente and M. Herranz:
  Semiempirical Functions for Electromagnetic Radiation Cross
  Sections - Methods and Results.
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1239/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  MS DOS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

       F. Legarda, O. Mtz. de la Fuente, M. Herranz
       Dpto Ingenieria Energetica
       E.T.S.I. Insdustriales y de Telecomunication
       Universidad del Pais Vasco
       Alda. Urquijo s/n
       48013 Bilbao (Spain)
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16. MATERIAL AVAILABLE
NEA-1239/01
source program   mag tapeDEMOCROS.FOR                               SRCTP
source program   mag tapePHOTO-CR.FOR Photo x-sec source program    SRCTP
source program   mag tapeRAY-CROS.FOR Raleigh scat ource program    SRCTP
source program   mag tapeCOMP-CRO.FOR Compton scat source program   SRCTP
object program   mag tapeDEMOCROS.OBJ object program                OBJTP
object program   mag tapePHOTO-CR.OBJ object program                OBJTP
object program   mag tapeRAY-CROS.OBJ object program                OBJTP
object program   mag tapeCOMP-CRO.OBJ object program                OBJTP
load module      mag tapeDEMOCROS.EXE executable image              LODTP
user's guide             Abstract and User's Guide                  WRKPT
paper                    SFERXS - Methods and Results               PAPPT
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17. CATEGORIES
  • J. Gamma Heating and Shield Design

Keywords: Compton effect, coherent scattering, cross sections, electromagnetic radiation, gamma radiation, photoelectric effect, shielding, transport theory.