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Summary A short review of recent data concerning development of production methods of some radioisotopes at FLNR JINR (Dubna) is presented. Nuclear reactions, targets, yields and radiochemical separation procedures for production of highly-pure radionuclides are given.

The excitation function was measured using the stacked foil technique for the formation of [sup 44]Ti in proton induced reactions on a vanadium target over the energy range 54-100 MeV. The maximum cross section (0.66[+-]0.13) mb was observed at (79[+-]2) MeV. The error was estimated to be [+-]20%. The experimental results are compared with theoretical calculations based on the hybrid model of nuclear reactions using the computer code Overlaid Alice. The calculated values are consistently higher than the experimental data. The production yield of [sup 44]Ti was estimated from the excitation function to be 0.015 [mu]Ci/[mu]Ah (540 Bq/[mu]Ah) for a 7.7 g/cm[sup 2] thick vanadium target with a proton entrance energy of 99.5 MeV and exit energy 53.4 MeV after an elapsed time of 1 year from EOB to allow for the decay of shorter lived radio-activities. (orig.)