New Neutron-Induced Cross-Section Measurements for Weak s-process Studies

Conference · Sun Jul 27 00:00:00 EDT 2008

DOI:https://doi.org/10.22323/1.053.0241· OSTI ID:979110

Guber, Klaus H. ^[1]; Wiarda, Dorothea ^[1]; Leal, Luiz C. ^[1]; Derrien, Herve ^[1]; Ausmus, Clint ^[1]; Brashear, Dane ^[1]; White, John A. ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Electron Linear Accelerator

A series of new neutron capture and transmission measurements has been undertaken at the Oak Ridge Electron Linear Accelerator (ORELA) in response to deficiencies identified in nuclear data libraries of crucial importance to the Nuclear Criticality Safety Program. New data and evaluations including covariances are required for several stable fission products as well as for materials found in mixtures with uranium. For example, chromium and nickel as constituents of stainless steel perform poorly in criticality calculations due to their relatively large neutron cross sections and substantial uncertainties in previous measurements. Therefore, new neutron-capture and total cross-section measurements are needed for 52,53Cr and 58,60Ni. These newly obtained data can be used not only to improve criticality calculations but also to serve as input parameters for the weak s-process stellar model calculations in massive stars. We will report on new experiments for these nuclides.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Electron Linear Accelerator
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 979110
• Resource Relation: Conference: 10. Symposium on Nuclei in the Cosmos NIC10, Mackinac Island, MI (United States) , 27 Jul – 1 Aug 2008; Related Information: https://archive.iupap.org/conferences/approved/conf08.html
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
CHROMIUM
CRITICALITY
CROSS SECTIONS
ELECTRONS
FISSION PRODUCTS
ISOTOPES
LINEAR ACCELERATORS
MIXTURES
NEUTRON REACTIONS
NEUTRONS
NICKEL
NUCLEI
S PROCESS
SAFETY
STAINLESS STEELS
STARS
TOTAL CROSS SECTIONS
UNIVERSE
URANIUM
Nuclear Criticality Safety Program (NCSP)
ORELA
Nuclear Criticality Safety
Cross-Section
Neutron Capture
Nuclides