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Neutron capture cross sections for /sup 86/Sr and /sup 87/Sr at stellar temperatures. Revision 1.

Author
Bauer, R. W.
Published
United States : [publisher not identified], 1986
Springfield, Va.: National Technical Information Service, [approximately 1986]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Becker, J. A., Howe, R. E., Mathews, G. J., and Ward, R. A.

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Summary
Recent work on s-process nucleosynthesis has focused attention on the investigation of capture cross sections for nuclei in the mass region near the N = 50 closed neutron shell. Of special astrophysical interest are (i) the analysis of the s-process branching through /sup 85/Kr as a monitor of stellar neutron density and temperature and (ii) the investigation of the possible chronometric pair /sup 87/Rb-/sup 87/Sr as an independent measure of the age of the galaxy. For both problems the capture cross sections of the two pure s-process nuclei /sup 86/Sr and /sup 87/Sr have to be known to an accuracy of 5% or better. The current investigation of the neutron capture cross sections for /sup 86/Sr and /sup 87/Sr was undertaken to extend recent measurements by Walter and Beer to energies below 3.5 keV, where strong resonances are known to exist, and to explore the discrepancy in the results of the Maxwellian averaged capture cross section of /sup 87/Sr at kT = 30 keV as reported by previous investigators. 9 refs., 1 fig.
Report Numbers
DE86012354; UCRL-94158-Rev.1; CONF-860741-1-Rev.1
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: W-7405-ENG-48
OSTI Identifier 5610107
Research organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States).
View MARC record | catkey: 47366094