  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.
