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

 

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Opened Access Neutron capture cross section measurement of 151 Sm at the CERN neutron time of flight facility (n_TOF)
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Author: Quesada Molina, José Manuel
Abbondanno, U.
Aerts, G.
Álvarez Velarde, F.
Álvarez Pol, H.
Andriamonje, S.
Andrzejewski, J.
Badurek, G.
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2004-10-15
Published in: Physical Review Letters, 93 (16), 161103-1-161103-5.
Document type: Article
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.
Cite: Quesada Molina, J.M., Abbondanno, U., Aerts, G., Álvarez Velarde, F., Álvarez Pol, H., Andriamonje, S.,...,Badurek, G. (2004). Neutron capture cross section measurement of 151 Sm at the CERN neutron time of flight facility (n_TOF). Physical Review Letters, 93 (16), 161103-1-161103-5.
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URI: http://hdl.handle.net/11441/62694

DOI: 10.1103/PhysRevLett.93.161103

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