Theoretical and experimental cross sections for neutron reactions on /sup 64/Zinc

Technical Report · Tue Mar 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/5544684· OSTI ID:5544684

Rutherford, D A

Accurate measurements of the /sup 64/Zn (n,2n)/sup 63/Zn and /sup 64/Zn (n,p)/sup 64/Cu cross sections at 14.8 MeV have been made using a Texas Nuclear Neutron Generator and the activation technique. A NaI(Tl) spectrometer (using two 6'' x 6'' NaI detectors/crystals) was ued to measure the gamma radiation emitted in coincidence from the positron-emitting decay products. The measurements were made relative to /sup 65/Cu (n,2n)/sup 64/Cu and /sup 63/Cu (n,2n)/sup 62/Cu cross sections, which have similar half-lives, radiation emission, and were previously measured to high accuracy (2%). The value obtained for the (n,2n) measurement was 199 +- 6 millibarns, and a value of 176 +- 4.5 millibarns was obtained for the (n,p) measurement. In concert, a theoretical analysis of neutron induced reactions on /sup 64/Zn was performed at Los Alamos National Laboratory using the Hauser-Feshbach statistical theory in the GNASH code over an energy range of 100 keV to 20 MeV. Calculations included width fluctuation corrections, direct reaction contributions, and preequilibrium corrections above 6 MeV. Neutron optical model potentials were determined for zinc. The theoretical values agree with the new 14.8 MeV measurements approximately within experimental error, with calculations of 201 millibarns for the (n,2n) cross section and 170 millibarns for the (n,p) cross section. Results from the analysis will be made available in National Evaluated Nuclear Data Format (ENDF/B) for fusion energy applications. 50 refs., 34 figs., 10 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5544684
• Report Number(s): LA-11233-T; ON: DE88005896
• Country of Publication: United States
• Language: English

Related Subjects

651620* -- Nuclear Properties & Reactions
A=59-89
Experimental
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
COMPARATIVE EVALUATIONS
COPPER 63 TARGET
COPPER 64 TARGET
COPPER 65 TARGET
CORRECTIONS
CROSS SECTIONS
DECAY
DETECTION
ELASTIC SCATTERING
ELECTROMAGNETIC RADIATION
FLUCTUATIONS
GAMMA RADIATION
HADRON REACTIONS
HAUSER-FESHBACH THEORY
IONIZING RADIATIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NEUTRON DETECTION
NEUTRON FLUX
NEUTRON REACTIONS
NEUTRON SOURCES
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEON REACTIONS
PARTICLE SOURCES
PROTON REACTIONS
RADIATION DETECTION
RADIATION FLUX
RADIATION SOURCES
RADIATIONS
SCATTERING
SPECTROMETERS
STATISTICAL MODELS
TARGETS
VARIATIONS
ZINC 64 TARGET