New neutron capture and total cross section measurements on {sup 88}Sr and their impact on s-process nucleosynthesis

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Description

The authors have made new and improved measurements of the neutron capture and total cross sections of {sup 88}Sr at the Oak Ridge Electron Linear Accelerator (ORELA). Improvements over previous measurements include a wider incident neutron energy range, the use of metallic rather than carbonate samples, better background subtraction, reduced sensitivity to sample-dependent backgrounds, and better pulse-height weighting functions. Because of its small cross section, the {sup 88}Sr(n,{gamma}) reaction is an important bottleneck during the 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 ... continued below

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4 p.

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Koehler, P.E.; Spencer, R.R. & Guber, K.H. November 1, 1998.

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Description

The authors have made new and improved measurements of the neutron capture and total cross sections of {sup 88}Sr at the Oak Ridge Electron Linear Accelerator (ORELA). Improvements over previous measurements include a wider incident neutron energy range, the use of metallic rather than carbonate samples, better background subtraction, reduced sensitivity to sample-dependent backgrounds, and better pulse-height weighting functions. Because of its small cross section, the {sup 88}Sr(n,{gamma}) reaction is an important bottleneck during the 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. They describe the experimental procedures, compare the results to previous data, and discuss their astrophysical impact.

Physical Description

4 p.

Notes

INIS; OSTI as DE99000245

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  • 5. nuclei in the cosmos, Volos (Greece), 6-11 Jul 1998

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  • Other: DE99000245
  • Report No.: ORNL/CP--99717
  • Report No.: CONF-980774--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/291087 | External Link
  • Office of Scientific & Technical Information Report Number: 291087
  • Archival Resource Key: ark:/67531/metadc679364

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  • November 1, 1998

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  • July 25, 2015, 2:20 a.m.

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  • Jan. 25, 2016, 12:27 p.m.

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Koehler, P.E.; Spencer, R.R. & Guber, K.H. New neutron capture and total cross section measurements on {sup 88}Sr and their impact on s-process nucleosynthesis, report, November 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc679364/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.