New gamma-ray buildup factor data for point kernel calculations: ANS-6. 4. 3 standard reference data
An American Nuclear Society Standards Committee Working Group, identified as ANS-6.4.3, has developed a set of evaluated gamma-ray isotropic point-source buildup factors and attenuation coefficients for a standard reference data base. The largely unpublished set of buildup factors calculated with the moments method has been evaluated by recalculating key values with Monte Carlo, integral transport, and discrete ordinates methods. Additional buildup factor data were obtained from PALLAS code results. Attention has been given to frequently-neglected processes such as bremsstrahlung and the effect of introducing a tissue phantom behind the shield. The proposed draft standard, provided as an appendix, contains data for a source energy range from 15 keV to 15 MeV and for 23 elements and 3 mixtures (water, air, and concrete). The buildup factor data are also represented as coefficients for the G-P fitting function. Tables giving correction factors for multiple scattering in tissue are also provided. 27 refs., 4 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Office of Administration and Resources Management; Oak Ridge National Lab., TN (USA). Radiation Shielding Information Center
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7032799
- Report Number(s):
- ORNL/RSIC-49; ON: DE89001317
- Country of Publication:
- United States
- Language:
- English
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New buildup factor data for point kernel calculations
New buildup factor data for point kernel calculations
Related Subjects
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BUILDUP
CALCULATION METHODS
DATA BASE MANAGEMENT
ELECTROMAGNETIC RADIATION
FUNCTIONS
GAMMA RADIATION
IONIZING RADIATIONS
MANAGEMENT
RADIATIONS
RESPONSE FUNCTIONS
SCATTERING
SHIELDING