Title: Resonance Capture Cross Section of 207Pb
Citation: PHYSICAL REVIEW C vol. 74 p. 054602
Publication Year: 2006
JRC N°: JRC35573
URI: http://journals.aps.org/prc/abstract/10.1103/PhysRevC.74.055802
DOI: 10.1103/PhysRevC.74.055802
Type: Articles in periodicals and books
Abstract: The radiative neutron capture cross section of 207Pb has been measured at the CERN neutron time of flight installation n TOF using the pulse height weighting technique in the resolved energy region. The measurement has been performed with an optimized setup of two C6D6 scintillation detectors, which allowed us to reduce scattered neutron backgrounds down to a negligible level. Resonance parameters and radiative kernels have been determined for 16 resonances by means of an R-matrix analysis in the neutron energy range from 3 keV to 320 keV. Good agreement with previous measurements was found at low neutron energies, whereas substantial discrepancies appear beyond 45 keV. With the present results, we obtain an s-process contribution of 77±8% to the solar abundance of 207Pb. This corresponds to an r-process component of 23±8%, which is important for deriving the U/Th ages of metal poor halo stars.
JRC Directorate:Health, Consumers and Reference Materials

Files in This Item:
There are no files associated with this item.

Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.