Observation of a candidate for the M1 scissors resonance in odd-odd Ho166

The $\ensuremath{\gamma}$-strength function and the nuclear level density for the odd-odd, rare-earth nucleus $^{166}\mathrm{Ho}$ have been extracted from $^{163}\mathrm{Dy}(\ensuremath{\alpha},p\ensuremath{\gamma})^{166}\mathrm{Ho}$ data using the Oslo method. A structure at $\ensuremath{\approx}3$ MeV in the $\ensuremath{\gamma}$-strength function is interpreted as the $M1$ scissors resonance. By employing three different methods we find that its strength depends rather strongly on the modeling of the $E1$ strength, while its centroid does not. The $^{166}\mathrm{Ho}$ scissors resonance parameters are consistent with previous results on other rare-earth nuclei.