NEA-1239 SFERXS.
SFERXS, Photoabsorption, Coherent, Incoherent Scattering Cross-Sections Function for Shielding
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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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.
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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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.
- 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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NEA-1239/01
source program mag tapeDEMOCROS.FOR SRCTPsource 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
Keywords: Compton effect, coherent scattering, cross sections, electromagnetic radiation, gamma radiation, photoelectric effect, shielding, transport theory.