Establishment of M1 multipolarity of a 6.5 mu_N^2 resonance in 172-Yb at E_gamma=3.3 MeV

Abstract

Two-step-cascade spectra in 172-Yb have been measured after thermal neutron capture. They are compared to calculations based on experimental values of the level density and radiative strength function (RSF) obtained from the 173-Yb(3-He,alpha gamma)172-Yb reaction. The multipolarity of a 6.5(15) mu_N^2 resonance at E_gamma=3.3(1) MeV in the RSF is determined to be M1 by this comparison.

4 pages including 3 figures

References in corpus (6)

• Extraction of level density and gamma strength function from primary gamma spectra
• Gamma-ray strength function and pygmy resonance in rare earth nuclei
• Thermal properties and radiative strengths in 160,161,162Dy
• Level densities and $\gamma$-strength functions in ${}^{148,149}$Sm
• Level densities and $\gamma$-ray strength functions in ${}^{170,171,172}$Yb
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