Microcanonical entropies and radiative strength functions ofV50,51

The level densities and radiative strength functions (RSFs) of $^{50,51}\mathrm{V}$ have been extracted using the ($^{3}\mathrm{He}$,$\ensuremath{\alpha}\ensuremath{\gamma}$) and ($^{3}\mathrm{He}$,$^{3}\mathrm{He}$${}^{\ensuremath{'}}\ensuremath{\gamma}$) reactions, respectively. From the level densities, microcanonical entropies are deduced. The high \ensuremath{\gamma}-energy part of the measured RSF fits well with the tail of the giant electric dipole resonance. A significant enhancement over the predicted strength in the region of ${E}_{\ensuremath{\gamma}}\ensuremath{\lesssim}3$ MeV is seen, which at present has no theoretical explanation.