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THE INVESTIGATION OF NONELASTIC CROSS SECTIONS FOR IRON BY THE NANOSECOND PULSED NEUTRON SOURCE TECHNIQUE

Journal Article · · Nuclear Science and Engineering (U.S.)
OSTI ID:4626349
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Nanosecond bursts of monoenergetic neutrons in the 1 Mev range are injected into various size assemblies of iron. The flux in these assemblies is observed to decay exponentially with characteristic nanosecond decay constants ( lambda ). lambda is shown to be composed of a sum of terms which represent loss of neutrons by leakage and through energy degradation by both nonelastic and elastic scattering. The sum of these two last effects can be represented by a total removal cross section, which can be determined by measuring lambda as a function of assembly size. A theoretical development is given for calculating the contribution to this total cross section due to elastic scattering; hence the total nonelastic cross section can be determined. Nonelastic cross sections for iron were measured by this technique in the range of primary neutron energies 0.8 to 1.5 Mev. (auth)
Research Organization:
Massachusetts Inst. of Tech., Cambridge
NSA Number:
NSA-17-040060
OSTI ID:
4626349
Journal Information:
Nuclear Science and Engineering (U.S.), Journal Name: Nuclear Science and Engineering (U.S.) Vol. Vol: 17; ISSN NSENA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

CONFIGURATION
CROSS SECTIONS
ENERGY
IRON
LIFETIME
LOSSES
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NEUTRON SOURCES
NUMERICALS
PHYSICS
PULSES
SCATTERING