Measurement and calculation of californium-252 fission neutron-induced gamma fields in iron. [Cross sections, neutron and gamma spectra]
The /sup 252/Cf fission neutron-induced gamma fields in iron were investigated experimentally and theoretically. The gamma leakage spectra from a series of relatively small iron spheres (15 to 35 cm in diameter) and the space-dependent gamma spectra within a relatively large (approximately 100- x 100- x 100-cm) steel pile were measured with an absolutely calibrated Si(Li) Compton spectrometer in the energy range from 0.3 to 3 MeV. In addition, neutron spectra (with a spherical proton recoil proportional counter and a /sup 3/He semiconductor spectrometer) and /sup 235/U fission rates were measured within the steel pile. The measurements are compared with calculations. For the calculation of the neutron spectra, the one-dimensional neutron transport code DTK (208 energy groups) was used, and for the calculation of the gamma spectra, an extended version (51 energy groups) of the gamma transport code BIGGI 4T and an (n-..gamma..) production cross-section matrix constructed from published data were used. The gamma flux induced by inelastic neutron scattering is well reproduced by the calculations, whereas that induced by capture processes is somewhat underestimated (approximately 20%).
- Research Organization:
- Kernforschungszentrum, Karlsruhe, Ger.
- OSTI ID:
- 6776995
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 66:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPUTER CODES
D CODES
GAMMA RADIATION
TRANSMISSION
IRON
NEUTRON REACTIONS
PHOTON TRANSPORT
FISSION
INELASTIC SCATTERING
URANIUM 235 TARGET
CALIFORNIUM 252
CROSS SECTIONS
GAMMA SPECTRA
LEAKS
MATRICES
NEUTRON TRANSPORT
NUCLEAR REACTION KINETICS
RADIATION FLUX
SPATIAL DISTRIBUTION
SPONTANEOUS FISSION
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
CALIFORNIUM ISOTOPES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTS
EVEN-EVEN NUCLEI
HADRON REACTIONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
KINETICS
METALS
NEUTRAL-PARTICLE TRANSPORT
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIATION TRANSPORT
RADIATIONS
RADIOISOTOPES
REACTION KINETICS
SCATTERING
SPECTRA
TARGETS
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES
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