Experimental Study of the 91Zr(n,gamma) Reaction Up to 26 keV

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physical Review C

OSTI ID:963926

Tagliente, G. ^[1]; Koehler, Paul Edward ^[2]

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1. Instituto Nazionale di Fisica Nucleare, Bari, Italy
2. ORNL

The neutron capture cross sections of the Zr isotopes are relevant to studies in nuclear structure, nuclear astrophysics, and nuclear technology. The valence neutron of {sup 91}Zr with respect to the neutron magic nucleus {sup 90}Zr has interesting implications for the statistical analysis in the proximity of shell closures. In stellar nucleosynthesis, the Zr isotopes are important for the s-process reaction flow between the Fe seeds and the heavier isotopes. Because of its relatively small (n,{gamma}) cross sections, Zr represents also an interesting structural material for nuclear reactors. For the same reason, these cross sections are difficult to measure and reliable data are sparse. Therefore, the (n,{gamma}) cross sections of the Zr isotopes have been remeasured at the CERN n{_}TOF facility. Thanks to its high instantaneous flux, good energy resolution, and low background, this facility is particularly suited for the determination of small, resonance-dominated cross sections. In this work, results for the {sup 91}Zr(n,){sup 92}Zr reaction are reported in the neutron energy range from thermal to 26 keV. In this region, accurate data of 157 resonances could be obtained, 33 of these resonances are not present in the main databases and/or were observed for the first time.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 963926
• Journal Information: Physical Review C, Journal Name: Physical Review C Journal Issue: 4 Vol. 78
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASTROPHYSICS
BUILDING MATERIALS
CAPTURE
CERN
CLOSURES
CROSS SECTIONS
ENERGY RANGE
ENERGY RESOLUTION
NEUTRON REACTIONS
NEUTRONS
NUCLEAR STRUCTURE
NUCLEOSYNTHESIS
REACTORS
S PROCESS
SEEDS
VALENCE