Measurement of the fast neutron capture cross section of ²³⁸U relative to ²³⁵U(n,f)

Conference · Mon Jan 01 00:00:00 EST 1979

OSTI ID:5788950

Fawcett, Jr., L. R.; Poenitz, W. P.; Smith, D. L.

The capture cross section of /sup 238/U was measured using the activation technique and /sup 235/U(n,f) as a reference cross section. Capture events were measured by detection of two prominent ..gamma..-transitions in the decay of the /sup 239/U daughter nuclide, /sup 239/Np, employing a high resolution Ge(Li) detector. The system was calibrated with samples activated in a thermal neutron flux relative to the capture cross section of gold, and with an absolutely calibrated ..cap alpha..-emitter, /sup 243/Am, which decays to /sup 239/Np. Cross section measurements were carried out in the neutron energy range from 30 keV to 3 MeV. Emphasis was on absolute values between 150 keV and 1 MeV where the /sup 238/U(n,..gamma..) cross section and its cross section is small. Background from fission products was found to restrict the accuracy of the measured data at energies > 1.5 MeV.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5788950
• Report Number(s): CONF-791058-65; TRN: 80-002888
• Resource Relation: Conference: International conference on nuclear cross sections for technology, Knoxville, TN, USA, 22 Oct 1979
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON REACTIONS
CAPTURE
URANIUM 238
CROSS SECTIONS
EXPERIMENTAL DATA
GRAPHS
KEV RANGE 10-100
KEV RANGE 100-1000
MEV RANGE 01-10
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
DATA
DATA FORMS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
HEAVY NUCLEI
INFORMATION
ISOTOPES
KEV RANGE
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
RADIOISOTOPES
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
652025* - Nuclear Properties & Reactions
A=220 & above
Experimental- Nuclear Reactions & Scattering- (-1987)