High-spin nuclear target of 178m2Hf: creation and nuclear reaction studies

A long-lived (31 years) four-quasiparticle isomer 178m2Hf(I,Kπ=16,16+) was produced in microweight quantities using the nuclear reaction 176Yb(4He, 2n). Methods of precision chemistry and mass-separation for the purification of the produced Hf material have been developed. Thin targets of isomeric hafnium-178 on carbon backings were prepared and used in experiments on a neutron, proton and deuteron beams. First results on nuclear reactions on a high-spin exotic target were obtained. Experiments on electromagnetic interactions of the isomeric hafnium using methods of the collinear laser spectroscopy as well as of the nuclear orientation of hafnium implanted into a crystalline media were started. 11 refs.; 11 figs.; 2 tabs