U.S. Department of EnergyOffice of Scientific and Technical Information
The measurement of the (206)Pb(n,gamma) cross section and stellar implications
Abstract
The neutron capture cross section of {sup 206}Pb has been measured at the CERN n/TOF spectrometer using a setup of two C{sub 6}D{sub 6} detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, which were analyzed via the R-matrix analysis code SAMMY. In the relevant energy ranges for stellar nucleosynthesis, i.e., at thermal energies of kT = 8 keV and kT = 23 keV, the present Maxwellian average cross section differs by 20% and 9% from the recommended values of Bao et al respectively. From the new cross section the s-abundance of {sup 206}Pb could be reliably determined as 70(4)%. This result is of importance in order to test and constrain r-process abundance calculations in the actinide region, because the r-process portion of {sup 206}Pb is dominated by {alpha}-back decays of short-lived transbismuth isotopes.
- Authors:
-
- Forschungszentrum Karlsruhe GmbH, Institute fur Kernphysik, Germany
- ORNL
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1036683
- DOE Contract Number:
- DE-AC05-00OR22725
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Physics G: Nuclear and Particle Physics
- Additional Journal Information:
- Journal Volume: 35; Journal Issue: 1; Journal ID: ISSN 0954-3899
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ABUNDANCE; ACTINIDES; CAPTURE; CERN; CROSS SECTIONS; ENERGY RANGE; NEUTRON REACTIONS; NUCLEOSYNTHESIS; R MATRIX; R PROCESS; SPECTROMETERS
Citation Formats
Domingo-Pardo, C., Koehler, Paul Edward, and N_TOF collaboration,. The measurement of the (206)Pb(n,gamma) cross section and stellar implications. United States: N. p., 2008.
Web.
Domingo-Pardo, C., Koehler, Paul Edward, & N_TOF collaboration,. The measurement of the (206)Pb(n,gamma) cross section and stellar implications. United States.
Domingo-Pardo, C., Koehler, Paul Edward, and N_TOF collaboration,. 2008.
"The measurement of the (206)Pb(n,gamma) cross section and stellar implications". United States.
@article{osti_1036683,
title = {The measurement of the (206)Pb(n,gamma) cross section and stellar implications},
author = {Domingo-Pardo, C. and Koehler, Paul Edward and N_TOF collaboration,},
abstractNote = {The neutron capture cross section of {sup 206}Pb has been measured at the CERN n/TOF spectrometer using a setup of two C{sub 6}D{sub 6} detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, which were analyzed via the R-matrix analysis code SAMMY. In the relevant energy ranges for stellar nucleosynthesis, i.e., at thermal energies of kT = 8 keV and kT = 23 keV, the present Maxwellian average cross section differs by 20% and 9% from the recommended values of Bao et al respectively. From the new cross section the s-abundance of {sup 206}Pb could be reliably determined as 70(4)%. This result is of importance in order to test and constrain r-process abundance calculations in the actinide region, because the r-process portion of {sup 206}Pb is dominated by {alpha}-back decays of short-lived transbismuth isotopes.},
doi = {},
url = {https://www.osti.gov/biblio/1036683},
journal = {Journal of Physics G: Nuclear and Particle Physics},
issn = {0954-3899},
number = 1,
volume = 35,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2008},
month = {Tue Jan 01 00:00:00 EST 2008}
}
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