Excitation functions of the nat-Ta(p,x)178m2Hf and nat-W(p,x)178m2Hf reactions at energies up to 2600 MeV

摘要

Due to potential level of energy intensity 178m2Hf is an extremelyinteresting isomer. One possible way to produce this isomer is irradiation ofnat-Ta or nat-W samples with high energy protons. Irradiation of nat-Ta andnat-W samples performed for other purposes provides an opportunity to study thecorresponding reactions. This paper pre-sents the 178m2Hf independentproduction cross sections for both targets measured by the gamma-rayspectrometry method. The reaction excitation functions have been obtained forthe proton energies from 40 up to 2600 MeV. The experimental results werecompared with calculations by various versions of the intranuclear cascademodel in the well-known codes: ISABEL, Bertini, INCL4.5+ABLA07, PHITS,CASCADE07 and CEM03.02. The isomer ratio for the nat-Ta(p,x)178m2Hf reaction isevaluated on the basis of the available data.