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Neutron capture studies of 206Pb at a cold neutron beam

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Abstract.

Gamma-ray transitions following neutron capture in 206Pb have been studied at the cold neutron beam facility of the Budapest Neutron Centre using a metallic sample enriched in 206Pb and a natural lead nitrate powder pellet. The measurements were performed using a coaxial HPGe detector with Compton suppression. The observed \( \gamma\) -rays have been incorporated into a decay scheme for neutron capture in 206Pb . Partial capture cross sections for 206Pb(n,\( \gamma\)) at thermal energy have been derived relative to the cross section for the 1884keV transition after neutron capture in 14N . From the average crossing sum a total thermal neutron capture cross section of \( 29^{+2}_{-1}\) mb was derived for the 206Pb(n,\( \gamma\)) reaction. The thermal neutron capture cross section for 206Pb has been compared with contributions due to both direct capture and distant unbound s-wave resonances. From the same measurements a thermal neutron-induced capture cross section of \( (649 \pm 14)\) mb was determined for the 207Pb(n,\( \gamma\)) reaction.

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Correspondence to P. Schillebeeckx.

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Communicated by D. Pierroutsakou

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Schillebeeckx, P., Belgya, T., Borella, A. et al. Neutron capture studies of 206Pb at a cold neutron beam. Eur. Phys. J. A 49, 143 (2013). https://doi.org/10.1140/epja/i2013-13143-3

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