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arXiv · 0808.3648

Enhanced radiative strength in the quasi-continuum of 117Sn

U. Agvaanluvsan·A. C. Larsen·R. Chankova·M. Guttormsen·G. E. Mitchell·A. Schiller·S. Siem·A. Voinov
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Abstract

Radiative strength functions of 117Sn has been measured below the neutron separation energy using the (3He,3He'gamma) reactions. An increase in the slope of the strength functions around E_gamma= 4.5 MeV indicates the onset of a resonance-like structure, giving a significant enhancement of the radiative strength function compared to standard models in the energy region 4.5 <= E_gamma <= 8.0 MeV. For the first time, the functional form of this resonance-like structure has been measured in an odd tin nucleus below neutron threshold in the quasi-continuum region.

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U. Agvaanluvsan, A. C. Larsen, R. Chankova, M. Guttormsen, G. E. Mitchell, A. Schiller, S. Siem, A. Voinov. 2009-01-19. Enhanced radiative strength in the quasi-continuum of 117Sn. https://doi.org/10.1103/physrevlett.102.162504

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