Sensitivity of primary knock-on atom spectra and displacement per atom cross sections to different secondary neutron energy and angular distributions and ''in-group'' weighting schemes

Technical Report · Sun Jan 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/5174552· OSTI ID:5174552

Gabriel, T. A.; Bishop, B. L.

The sensitivity of primary knock-on atom (PKA) spectra and displacement per atom (DPA) cross sections to different secondary neutron energy and angular distributions and ''in-group'' weighting schemes is investigated. It is shown that the sensitivity of the PKA spectra and DPA cross sections for the (n,n' unresolved) and (n,2n) reactions in Fe to different angular distributions and the same secondary neutron spectrum is reasonably large (approximately 15%), whereas the sensitivity of these quantities to grossly different secondary neutron spectra and the same angular distribution is unexpectedly small. It is also shown that for Al the sensitivity of damage energy cross sections to different ''in-group'' weighting schemes is, for the most part, small.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5174552
• Report Number(s): ORNL/TM-6108
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106 -- Metals & Alloys-- Radiation Effects
654003* -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM
ANGULAR DISTRIBUTION
BARYONS
CROSS SECTIONS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY DEPENDENCE
FAST NEUTRONS
FERMIONS
HADRONS
IRON
KNOCK-ON REACTIONS
METALS
NEUTRAL-PARTICLE TRANSPORT
NEUTRON SPECTRA
NEUTRON TRANSPORT
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATION TRANSPORT
SPECTRA
TRANSITION ELEMENTS
TRANSMISSION