EXPERIMENTAL DETERMINATION OF ~(80'82'83)Kr(α,xn)~(82)Sr CROSS SECTIONS FOR REACTION THRESHOLD TO 60 MeV a-PARTICLES

摘要

The activation method has been used to determine the experimental cross sections of the nuclear reactions ~(80)Kr(a, 2n)~(82)Sr, ~(82)Kr(a, 4n)~(82)Sr, and ~(83)Kr(a, 5n)~(82)Srfor a-particle energies from the reaction threshold to Ea = 60 MeV on targets which are highly enriched with krypton isotopes. The structural and geometric parameters are established for a "thick" cascade target with krypton isotopes, which gives maximum Sr yield for E_a < 60 MeV. The Sr yield in the indicated target for initial energy E_a = 60 MeV is estimated to be 3.4.10~6 Bq/(μA-h), which gives a basis for commercial applications of this isotope in medium-energy accelerators.