Power range of photoneutrons from $^{209}$Bi at $\mathrm{E}_{\gamma\max} = 12$ MeV

On a bunch of brake radiation of the betatron the power range of photoneutrons from $^{209}$Bi is measured. Measurements are executed by means of a scintillation spectrometer on the basis of a stilbene crystal with discrimination $\gamma$-radiations in an impulse form. The obtained data are compared with known of literature and analyzed on the basis of evaporation model.