Measurement of the neutron capture cross section of the s-only isotope {sup 204}Pb from 1 eV to 440 keV
- Forschungszentrum Karlsruhe GmbH (FZK), Institut fuer Kernphysik (Germany)
- Istituto Nazionale di Fisica Nucleare, Trieste (Italy)
- CEA/Saclay-DSM, Gif-sur-Yvette (France)
- Universidade de Santiago de Compostela (Spain)
- Centro de Investigaciones Energeticas Medioambientales y Technologicas, Madrid (Spain)
The neutron capture cross section of {sup 204}Pb has been measured at the CERN n{sub T}OF installation with high resolution in the energy range from 1 eV to 440 keV. An R-matrix analysis of the resolved resonance region, between 1 eV and 100 keV, was carried out using the SAMMY code. In the interval between 100 keV and 440 keV we report the average capture cross section. The background in the entire neutron energy range was reliably determined from the measurement of a {sup 208}Pb sample. Other systematic effects in this measurement were investigated and precisely corrected by means of detailed Monte Carlo simulations. We obtain a Maxwellian average capture cross section for {sup 204}Pb at kT=30 keV of 79(3) mb, in agreement with previous experiments. However our cross section at kT=5 keV is about 35% larger than the values reported so far. The implications of the new cross section for the s-process abundance contributions in the Pb/Bi region are discussed.
- OSTI ID:
- 20990983
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 1; Other Information: DOI: 10.1103/PhysRevC.75.015806; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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