[en] Studies of high-energy nuclear reactions are of great important. It may help in deeper understanding of the reaction mechanisms and in extending of various fields of applications such as astrophysics, radiation physics, intense neutron source production and nuclear waste transmutation. The aim of the present work is to investigate the multineutron photonuclear on ¹⁹⁷Au bombarded by 2.5 GeV Bremsstrahlung. Most of the photodisintegration products of gold with half-lives sufficient for the activity measurement. In this work, the necessary corrections were made in order to improve the accuracy of the experimental results The obtained experimental results are in good agreement with the calculated values. The yields for the ¹⁹⁷Au(γ,xn)¹⁹⁷-xAu reactions depend not only on the excitation energies but also on the number of neutrons ejected