Thermal-neutron capture by 208Pb

Details Thermal-neutron capture by 208Pb Thermal-neutron capture by 208Pb

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvc..65d5801b&link_type=abstract

Physical Review C, vol. 65, Issue 4, id. 045801

Physics

3

Radiative Capture, Hydrostatic Stellar Nucleosynthesis, 190<=A<=219

Scientific paper

We have observed seven γ rays following subthermal-neutron capture by 208Pb and incorporated them into a level scheme of 209Pb consisting of five excited levels. The measured neutron separation energy of 209Pb is 3938.0+/-0.5 keV. The thermal-neutron capture cross section of 208Pb was determined to be 230+/-12 μb. The theoretical estimates are 860 μb or 550 μb, depending on the model used for the compound-nuclear component; however, these values are not inconsistent with the data if the statistical distribution of the theoretical estimates is taken into account. The thermal-neutron capture cross sections for 206Pb and 207Pb were also determined and found to be 26.6+/-1.2 mb and 610+/-30 mb, respectively.

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