Progress report. Coupled-channel (CC) optical model potentials for calculations with coupling built on soft-rotator model for nucleon induced reactions up to 200 MeV incident energies in A = 24 - 120 mass region

Modernizing of optical potential incorporated in OPTMAN CC model code for accounting dispersive relationships between real and imaginary optical potential parts had been carried out. This allowed search of the regional optical potential for tungsten isotopes (W-182,W-184,W-186) and Tantalum. The following actions had been accomplished: All the available optical experimental data for tungsten isotopes and tantalum were collected and converted into input of OPTMAN code for optical potential search option. Missing data in the EXFOR database and the new one have been searched by the Nuclear Data Section - good communications with the Nuclear Data Section helped greatly to fulfil this task. Individual dispersive coupled channel potentials for W-182,184,186 and Ta-181 nuclides were found. Regional optical potentials for tungsten and tantalum region based on individual dispersive optical potentials have been fixed. Developed regional potentials had been included in the RIPL library, which was the main goal of the second year of activity. New Lane consistent ideas, allowing a consistent approach for (p,n) direct cross section predictions with isobar analogous collective states excitation, was incorporated in OPTMAN code. Modernized version of CC OM code OPTMAN has been distributed among interested scientists in Member States through RIPL project. Contract permitted very fruitful international scientific cooperation aimed towards incorporating the ideas of Lane consistent approach and dispersive relationships between imaginary and real parts of optical potential - developed in cooperation with Capote (IAEA) and Quesada (Seville University) into the CC optical code OPTMAN, to be used for high priority practical applications. We also demonstrated that our W/Ta potential is capable of describing with very high accuracy not only the available scattering data, but much more accurate tungsten isotope total cross section ratios in a wide incident energy region from resonance region up to at least 200 MeV. This is not possible with any other potential available. This is a significant result of the international cooperation of scientists from Belarus, IAEA, Spain and Japan that became possible due to the IAEA contract