Measurements of the /sup 235/U(n,f) standard cross section at the National Bureau of Standards

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6590022

Johnson, R G; Carlson, A D; Wasson, O A; Duvall, K C; Behrens, J W; Meier, M M; Patrick, B D; Dias, M S

The primary mission of the Neutron Interactions and Dosimetry Group at the National Bureau of Standards (NBS) is the measurement of the standard neutron cross sections. The group has had a long-term program for the measurement of one of the most important of these cross sections---the neutron-induced fission cross section of /sup 235/U. Since the ENDF/B-VI evaluation has been recently released, it is appropriate to review the measurements of the /sup 235/U(n,f) cross section which have been made at the NBS using accelerator-based neutron sources. In the 0.1--20 MeV region where this cross section is a standard, six separate measurements of the differential cross section, using a variety of techniques have been made. Both the NBS 150-MeV Electron Linac and the 3-MV Positive Ion Accelerator have been used as neutron sources. Two of the measurements are relative to the H(n,p) cross section while the remainder are absolute. These measurements will be reviewed and compared to ENDF/B-VI. The current status of this program and possible future improvements will be discussed. 11 refs., 3 figs., 1 tab.

• Research Organization: National Bureau of Standards, Washington, DC (USA)
• DOE Contract Number: AI01-86ER40275; W-7405-ENG-36
• OSTI ID: 6590022
• Report Number(s): CONF-880546-42; ON: DE89004817
• Country of Publication: United States
• Language: English

Related Subjects

652020* -- Nuclear Properties & Reactions
A=220 & above
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CROSS SECTIONS
ENERGY DEPENDENCE
FISSION
HADRON REACTIONS
NATIONAL ORGANIZATIONS
NEUTRON REACTIONS
NUCLEAR DATA COLLECTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
TARGETS
URANIUM 235 TARGET
US DOC
US NBS
US ORGANIZATIONS