2018 article

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Astrophysical relevance of the low-energy dipole strength of Pb-206

16TH INTERNATIONAL SYMPOSIUM ON CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS (CGS16), Vol. 178.

By: A. Tonchev^*, N. Tsoneva ^*, S. Goriely ^*, C. Bhatia^*, C. Arnold^*, S. Hammond^*, J. Kelley ⁿ, E. Kwan^* ...and 6 other authors, H. Lenske ^*, J. Piekarewicz ^*, R. Raut ^*, G. Rusev ^*, T. Shizuma ^* & W. Tornow ^*

10.1051/epjconf/201817804003

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Added: August 26, 2019

The dipole strength of 206Pb was studied below the neutron separation energy using photon scattering experiments at the HIGS facility. Utilizing the technique of nuclear resonance fluorescence with 100% linearly-polarized photon beams, the spins, parities, branching ratios and decay widths of excited states in 206Pb from 4.9 - 8.1 MeV have been measured. The new experimental information is used to reliably predict the neutron capture cross section of 205Pb, an important branch point nucleus along the s-process path of nucleosynthesis.