  Preliminary results of neutron spectra measurements from Pb, W, and Na
targets irradiated by 0.8 and 1.6 GeV protons are presented. Measurements have
been carried out using the proton beam extracted from the ITEP synchrotron and
the TOF technique. Neutron registration has been carried out using BICRON
MAB-511 liquid scintillation counters. Spectra measured at angles of 30, 60,
90, 120, and 150 degrees have been compared with results of their simulation
using the LAHET code system and the code CEM2k. The results are of interest
both from data gathering viewpoint and as a benchmark of the up-to-the-date
predictive powers of codes applied to design the hybrid Accelerator Driven
Systems (ADS) using lead or lead-bismuth targets and sodium-cooled targets.
