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        Low-lying dipole response in the relativistic quasiparticle time blocking approximation and its influence on neutron capture cross sections

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        0903.5439v1.pdf (PDF, 243Kb)
        Author
        Litvinova, E.
        Loens, H. P.
        Langanke, K.
        Martinez-Pinedo, G.
        Rauscher, T.
        Ring, P.
        Thielemann, Friedrich-Karl
        Tselyaev, V.
        Attention
        2299/11656
        Abstract
        We have computed dipole strength distributions for nickel and tin isotopes within the Relativistic Quasiparticle Time Blocking Approximation (RQTBA). These calculations provide a good description of data, including the neutron-rich tin isotopes (130.132)Sn. The resulting dipole strengths have been implemented in Hauser-Feshbach calculations of astrophysical neutron capture rates relevant for r-process nucleosynthesis studies. The RQTBA calculations show the presence of enhanced dipole strength at energies around the neutron threshold for neutron rich nuclei. The computed neutron capture rates are sensitive to the fine structure of the low lying dipole strength. which emphasizes the importance of a reliable knowledge of this excitation mode. (C) 2009 Elsevier B.V. All rights reserved.
        Publication date
        2009-05-15
        Published in
        Nuclear Physics A
        Published version
        https://doi.org/10.1016/j.nuclphysa.2009.03.009
        Other links
        http://hdl.handle.net/2299/11656
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