  The direct gamma-spectrometry method is used to measure more than 350
residual product nuclide yields from 0.1, 0.2, 0.8, and 2.6 GeV proton
irradiated HgO targets. The gamma-spectrometer resolution is of 1.8 keV at the
1332 keV gamma-line. The resultant gamma-spectra are processed by the
GENIE-2000 code. The gamma-lines are identified, and the cross-sections
calculated, by the ITEP-designed SIGMA code using the PCNUDAT radioactive
database. The 27-Al(p,x)Na-22 reaction is used as monitor. The experimental
results are compared with calculations by the LAHET, CEM95, CEM2k, INUCL,
CASCADE, and YIELDX codes.
