Enhanced radiative strength in the quasi-continuum of 117Sn

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.

arXiv comment4 pages, 3 figures

References in corpus (5)

• Extraction of level density and gamma strength function from primary gamma spectra
• Large-scale QRPA calculation of E1-strength and its impact on the neutron capture cross section
• Quasiparticle random phase approximation based on the relativistic Hartree-Bogoliubov model
• Dipole states in stable and unstable nuclei
• Gamma-ray strength function and pygmy resonance in rare earth nuclei

Cited by in corpus (13)

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• Evolution of the pygmy dipole resonance in Sn isotopes
• Level densities and $\gamma$-ray strength functions in Sn isotopes
• Transitional $\gamma$ strength in Cd isotopes
• Experimental study of the electric dipole strength in the even Mo nuclei and its deformation dependence
• Experimental level densities of atomic nuclei
• Gamma-strength functions in 60Ni from two-step cascades following proton capture
• Radiative strength functions in 163,164Dy
• Nuclear level densities and $\gamma -$ray strength functions of ${}^{111,112,113}$Sn isotopes studied with the Oslo method
• Indirect measurement of the $(n,\gamma {)}^{127}$Sb cross section