Preparation of multilayer targets for g-factor measurement of rotational levels

The three-layer-sandwich targets of 58,60Ni–Fe–Cu, 11B–Fe–Cu and 67,68,70Zn–Fe–Au have been prepared for g-factor measurement of rotational levels. The ferromagnetic Fe middle layers of 1.2–1.5 mg/cm2 Fe have been made by rolling interrupted by annealing against hardening. Thick recoil stopper layers (5–12 mg/cm2) of Cu and Au on one side of Fe foils have been fabricated by vacuum evaporation. Isotopic Zn, B and Ni layers of 150–400 μg/cm2 have been deposited on the opposite side of the Fe foil by electron beam evaporation and focused ion beam sputtering, respectively. For better homogeneity the substrates were rotated.