  The JASMIN Collaboration has performed an experiment to conduct measurements
of nuclear reaction rates around the anti-proton production (Pbar) target at
the Fermi National Accelerator Laboratory (FNAL). At the Pbar target station,
the target, consisting an Inconel 600 cylinder, was irradiated by a 120 GeV/c
proton beam from the FNAL Main Injector. The beam intensity was 3.6 x 10**12
protons per second. Samples of Al, Nb, Cu, and Au were placed near the target
to investigate the spatial and energy distribution of secondary particles
emitted from it. After irradiation, the induced activities of the samples were
measured by studying their gamma ray spectra using HPGe detectors. The
production rates of 30 nuclides induced in Al, Nb, Cu, Au samples were
obtained. These rates increase for samples placed in a forward (small angle)
position relative to the target. The angular dependence of these reaction rates
becomes larger for increasing threshold energy. These experimental results are
compared with Monte Carlo calculations. The calculated results generally agree
with the experimental results to within a factor of 2 to 3.
