Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....44..233w&link_type=abstract
Astronomy and Astrophysics, vol. 44, no. 1, Nov. 1975, p. 233-236.
Astronomy and Astrophysics
Astrophysics
19
Cosmology, Galactic Evolution, Nuclear Fission, Nuclear Fusion, Radioactive Decay, Astronomical Models, Astrophysics, Heavy Nuclei, Neutron Stars, Nuclear Radiation Spectroscopy
Scientific paper
Recent calculations on the yield of beta-stable nucleides from thermo-nuclear reactions indicate that the beta-delayed fission will play an important role in the decay of very heavy neutron-rich nuclei far off the beta-stability line. After the r-process event, the heavy actinides beta decay to the line of beta-stability: in doing so, they pass through the same area as nucleides produced in man-made explosions and will therefore also have their number reduced by delayed fission. The effect of this fission dissipation on the production ratios of the chronometric pairs, U-238/Th-232, U-235/U-238, and Pu-244/Th-232 is investigated, and we show that the two latter pairs may have their ratios reduced by as much as 30-40% with respect to earlier estimates.
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