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

Conference ·
OSTI ID:5788950
; ;

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 Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5788950
Report Number(s):
CONF-791058--65
Country of Publication:
United States
Language:
English

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Related Subjects

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