Physics – Nuclear Physics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvc..32..738b&link_type=abstract
Physical Review C (Nuclear Physics), Volume 32, Issue 3, September 1985, pp.738-755
Physics
Nuclear Physics
19
Radiative Capture, Origin, Formation, And Abundances Of The Elements, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages
Scientific paper
The neutron capture cross sections of 198,199,200,201,20 2,204Hg(n,γ) were measured in the energy range 2.6 to 500 keV. The average capture cross sections were calculated and fitted in terms of strength functions. Resonance parameters for the observed resonances were determined by a shape analysis. Maxwellian averaged capture cross sections were computed for thermal energies kT between 5 and 100 keV. The solar mercury abundance was determined to be 0.34+/-0.04 relative to Si=106. The termination of s-process nucleosynthesis at lead and bismuth was investigated. The abundances of 206,207,208Pb were reproduced introducing a strong fluence component of the s process in addition to normal s- and r-process nucleosynthesis. The radiogenic 207Pb abundance was determined and the r-process age was calculated via 235U. Using Fowler's exponential model, an age T=4.6 Gyr +Δ=17.2+/-2.6 Gyr was obtained.
Beer Hermann
Macklin Richard L.
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