{sup 142,144}Nd(n,{gamma}) cross sections for astrophysical s-process studies
- Oak Ridge National Laboratory, TN (United States); and others
Refined stellar models provide a promising tool for studies of the synthesis of heavy elements in the stellar plasma of Red Giant Stars. These models require more accurate (n,y) cross sections in a lower temperature range (kT=12 keV){sup 3}. We have recently completed measurements of the.... Nd(n,{gamma}) cross sections from approximately 20 eV to 100 keV. With them data we should be able to check the possible branching in the s-process path at {sup 141}Ce. Accurate (n,{gamma}) cross sections would help to determine the r- and p-process residuals of then isotopes and to resolve the puzzle of the recently discovered isotopic anomalies in silicon carbide grains from the Murchison meteoritd. The (n{gamma}) cross sections should result in a much more accurate determination of the astrophysical reaction rates near kT=12 keV. The measurements were performed at the Oak Ridge Election Linear Accelerator (ORELA) using a recently improved C6D6 detector apparatus and a new 4{pi} BaF{sub 2}-detector system. We will describe the experimental set up and report on the results and their consequences for the s-process nucleosynthesis models.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 255571
- Report Number(s):
- CONF-9510116--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 10 Vol. 40; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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