  The bremsstrahlung flux-averaged cross sections for the photoneutron
reactions $^{\text{93}}$Nb($\gamma $,xn;x=1-5)$^{\text{(93-x)m,g}}$Nb were
measured in the range of boundary energies of bremsstrahlung $\gamma $-quanta
$E_{\gamma \text{max}}$=33-93 MeV with a step $\Delta E_{\gamma
\text{max}}\approx $ 2 MeV. The isomeric ratios of the average cross-sections
of the products of the reactions $^{\text{93}}$Nb ($\gamma $
,4n)$^{\text{89m,g}}$Nb and $^{\text{93}}$Nb($\gamma $,5n)$^{\text{88m,g}}$ Nb
were determined in the energy ranges $E_{\gamma \text{max}}$ = 50-93 and 70-93
MeV, respectively. The experiments were carried out on the beam of the linear
electron accelerator LU-40 of the Science and Research Establishment (SRE)
"Accelerator" at National Science Center Kharkov Institute of Physics and
Technology (NSC KIPT) using the method of induced activity. Calculations of the
cross sections, average cross sections, and isomeric ratios of the reaction
products were performed using the TALYS 1.9 code with default parameters and
the GEANT4 code. The tendency of a more successful description of the average
cross sections of photoneutron reactions with the formation of final odd-even
Nb nuclei than odd-odd Nb nuclei is revealed. The experimental average cross
sections for the reactions ($\gamma $,2n) and ($\gamma $,4n) are in good
agreement with theory, while in the case of reactions ($\gamma $,n), ($\gamma
$,3n), and ($ \gamma $,5n), some discrepancies are observed. The results
obtained for the reactions ($\gamma $,n), ($\gamma $,3n) and ($\gamma $,4n) are
in satisfactory agreement with the known literature data. The average cross
sections for the reactions ($\gamma $,2n) and ($\gamma $,5n) and the isomeric
ratios of the reaction products $^{\text{93}}$Nb($\gamma
$,5n)$^{\text{88m,g}}$Nb were measured for the first time.
