Physics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phrvc..76a4605b&link_type=abstract
Physical Review C, vol. 76, Issue 1, id. 014605
Physics
5
Radiative Capture, Resonance Reactions, 190<=A<=219, Neutron Absorption
Scientific paper
Neutron total and capture reaction cross-section measurements for Pb206 were performed at the GELINA neutron time-of-flight facility in the energy range from 1 to 620 keV. The resonance parameters corresponding to 304 excited nuclear levels in Pb207 were determined from the data using the R-matrix formalism. The results are compared to existing data. From the capture data photon strength functions have been deduced. No evidence has been found for a previously reported enhancement of the M1 transition strength, nor for a strong enhancement of the s-wave doorway state in the photon channel. The neutron capture cross section of Pb206 is of importance in stellar evolution calculations of the formation of the elements by neutron capture. Maxwellian-averaged neutron capture cross sections have been calculated at different stellar temperatures ranging up to 100 keV and compared with the results of previous work and evaluated data libraries.
Borella A.
Gunsing F.
Moxon M.
Schillebeeckx P.
Siegler P.
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