Abstract
The independent yield distribution of the Hg isotopes, measured for thereaction of 600 MeV 18O projectile with a nat.Pb target, isconverted to 18O+208Pb system and is compared with an Hg-isotopedistribution from the spallation reaction of 1 A GeV 208Pb on proton.The comparison shows the differences between the two distributions on theproduction cross sections, isotope-distribution widths as well as theirshapes. A great increase of the neutron-deficient Hg isotope yield withincrease of bombarding energies of protons from 600 MeV to 1 GeV isderived. This fact results in an experimental evidence for rapid increasingneutron yields with rising proton bombarding energy from 0.6 GeV to 1 GeV.
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