New High-Resolution Neutron Capture and Total Cross Section Measurements on ^88Sr and Their Impact on s-process Nucleosynthesis

Details New High-Resolution Neutron Capture and Total Cross Section Measurements on ^88Sr and Their Impact on s-process Nucleosynthesis New High-Resolution Neutron Capture and Total Cross Section Measurements on ^88Sr and Their Impact on s-process Nucleosynthesis

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp..b413k&link_type=abstract

American Physical Society, Division of Nuclear Physics Meeting, October 28-31, 1998 Santa Fe, New Mexico, abstract #B4.13

Physics

Nuclear Physics

Scientific paper

We have made new and improved measurements of the neutron capture and total cross sections for ^88Sr at the Oak Ridge Electron Linear Accelerator (ORELA). Improvements over previous measurements include a wider incident neutron energy range, an improved (metallic versus carbonate) sample, better background subtraction, reduced sensitivity to neutron scattering backgrounds, and better weighting functions. Because of its small cross section, the ^88Sr(n,γ ) reaction is an important bottleneck during s-process nucleosynthesis. Hence, an accurate determination of this rate is needed to better constrain the neutron exposure in s-process models and to more fully exploit the recently discovered isotopic anomalies in certain meteorites. We will describe our experimental procedures, compare our results to previous data, and discuss their astrophysical impact.

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