Status and needs for neutron cross section standards

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:69606

Wasson, O A ^[1]

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1. National Institute of Standards and Technology (NIST), Gaithersburg, MD (United States)

The status of the standard neutron cross sections are reviewed from the view point of author`s opinion that improved nuclear data are needed. The leverage on the nuclear data system produced by improved accuracies in the standards are explored. These standards, which the H(n,p), {sup 3}He(n,p), {sup 6}Li(n,{alpha}), {sup 10}B(n,{alpha}), C(n,n), Au(n,{gamma}), and {sup 235}U(n,f) cross sections, have been specified in the neutron energy region below 20 MeV. However there is a growing need to extend the standards to higher neutron energies. Regions of significant uncertainties are examined. The influence of recent neutron cross section standards measurements, particularly the angular distribution of neutron scattering from hydrogen, the neutron reactions with {sup 10}B, and the {sup 235}U(n,f) reaction, are discussed. New standards measurements relevant to satisfying critical nuclear data needs are discussed.

• OSTI ID: 69606
• Report Number(s): CONF-940507--Vol.1
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BORON 10 TARGET
CAPTURE
CARBON
CHARGE-EXCHANGE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
ELASTIC SCATTERING
FISSION
GOLD 197 TARGET
HELIUM 3 TARGET
HYDROGEN 1 TARGET
LITHIUM 6 TARGET
MEV RANGE 10-100
NEUTRON REACTIONS
URANIUM 235 TARGET