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Neutron capture cross section measurement of 151 Sm at the CERN neutron time of flight facility (n_TOF)

Authors :
Quesada Molina, José Manuel
Abbondanno, U.
Aerts, G.
Álvarez Velarde, F.
Álvarez Pol, H.
Andriamonje, S.
Andrzejewski, J.
Badurek, G.
Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
European Commission (EC)
Source :
idUS. Depósito de Investigación de la Universidad de Sevilla, instname
Publication Year :
2004
Publisher :
American Physical Society, 2004.

Abstract

The151Sm(n,γ)152Sm cross section has been measured at the spallation neutron facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The new facility combines excellent resolution in neutron time-of-flight, low repetition rates, and an unsurpassed instantaneous luminosity, resulting in rather favorable signal/background ratios. The 151Sm cross section is of importance for characterizing neutron capture nucleosynthesis in asymptotic giant branch stars. At a thermal energy of kT=30 keV the Maxwellian averaged cross section of this unstable isotope (t1/2=93 yr) was determined to be 3100±160 mb, significantly larger than theoretical predictions. Comisión Europea FIKW-CT-2000-00107

Subjects

Subjects :
Nuclear Experiment

Details

Database :
OpenAIRE
Journal :
idUS. Depósito de Investigación de la Universidad de Sevilla, instname
Accession number :
edsair.dedup.wf.001..beb4ea0aab6b935b9bbcfef74a0fbf4b