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Targets of isotopically enriched 170Er (erbium) were prepared on 45 μg/cm2 carbon backing using the method of vacuum evaporation. Another layer of carbon with thickness 23 μg/cm2 was deposited on it as a protective cap with the help of an electron gun. Carbon backing, Er and the capping carbon layer were deposited using resistive heating and electron gun deposition without disturbing the vacuum. The...