SPECTRUM CALCULATIONS FOR NEUTRONS SLOWING DOWN BY ELASTIC COLLISIONS
Technical Report
·
OSTI ID:4089963
A method is suggested for obtaining the collision density as a fuuction of lethargy for neutrons slowing down in an infinite homogeneous moderator containing uniformly distributed sources of fission neutrons. The reactions considered include elastic scattering, spherically symmetric in the center of mass system, and absorption. The solution, which is exact for single element moderators when the only neutron reaction is elastic scattering, extends the well known Greuling-- Goertzel approximation and shows that it is in error by no more than 13%. The method is also exact for a mixture of nuclides, provided the cross section ratios are energy independent, and is a useful approximation otherwise. (auth)
- Research Organization:
- Australia. Atomic Energy Commission Research Establishment, Lucas Heights, New South Wales
- NSA Number:
- NSA-15-005573
- OSTI ID:
- 4089963
- Report Number(s):
- AAEC/E-54
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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