Analysis of errors in reconstruction of neutron spectra measures by an activation method

Possible sources of errors in reconstruction of fast neutron spectra on the base of the results of activation detector measurements using the ITER method of successive approximations are investigated. Test experiments on studying the errors in spectrum reconstruction connected with the errors in spectrum reconstruction connected with the errors in activation integrals and a priori data selection are performed. The recommenations on selection of initial approximations are given. Maximum possible errors related to a priori data are determined