Production of radioisotopes by the triton beam for novel applications: 42K nuclid generator and 63Ni Moessbauer effect

In the present thesis the production of the radioisotopes 42Ar and 63Co by the 7.2 MeV triton beam of the Munich compact cyclotron and new possibilities of its practical application are reported. These nuclides are by other projectiles, especially if their quantity and radiochemical purity which are necessary for the experiments described here producable only with difficulties. In the first part of the thesis a gas target was constructed and by the reaction 40Ar(t,p)42Ar the long-lived 42Ar (Tsub(1/2)=33 y) produced. It serres as parent isotope in a nuclid generator for the short-lived 42K (Tsub(1/2)=12.4 h) which originates by β- decay from the 42Ar. A simple, electrostatic separation method was developed by which the 42K+ ions produced in the decay of 42Ar can be obtained with large yield from the argon gas. In the second part of this thesis by the reaction 64Ni(t,α)63Co the short-lived 63Co (Tsub(1/2)=27.5 sec) was produced in order to use it as source for Moessbauer effect measurements at 63Ni. For this a target irradiation chamber cooled with liquid nitrogen was constructed which is connected via an also nitrogen cooled fast target transport system with a especially constructed measuring cryostat. By this facility at the first time the recoilless nuclear resonance in the 87 keV transition in the radioactive 63Ni could be observed. (orig.)