MEASUREMENT OF [sup.186]Re, [sup.188]Re, [sup.189]Re YIELD ON [sup.186]W TARGET IRRADIATION BY [sup.4]He, [sup.3]He, [sup.1]H, AND [sup.2]H

The saturation yield of the rhenium radioisotopes [sup.186]Re, [sup.188]Re, and [sup.189]Re on irradiation of a [sup.186]W target by the nuclei [sup.4]He, [sup.4]He, [sup.1]H, and [sup.2]H with energy 47, 25, 15.3, and 19 MeV, respectively, was measured by the activation method. The chosen energy of the accelerated particles made it possible to minimize the contribution of the activity of long-lived rhenium radioisotopes in the desired radionuclides. The highest yield 3240 [+ or -] 330 MBq/pA was obtained for the radioisotope [sup.186]Re in the reaction [sup.186]W([sup.2]H, 2n).sup.186]Re. The obtained yield makes it possible to plan on using in radioimmunotherapy the radionuclide [sup.186]Re produced by means of this reaction.