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ZINC
Natural Abundance, Stable Isobars Zn64, 48.89%, Ni64 Zn66, 27.81%, Ge70 Zn67, 4.11% Zn68, 18.56% Zn70, 0.62% Zinc metal, in the form of 10-mesh granules, is the only charge material which has been used in separating the isotopes of this element. The halides of zinc appear to be acceptable as charge material on the basis of vapor pressure requirements for source operation; however, the metal is preferred because its lower vapor pressure minimizes product contamination by un-ionized vapor, and its use eliminates undesirable extraneous ion beams. The usual charge consists of 500 g zinc metal in a style S-16 stainless steel charge bottle. Granulated zinc metal is available from commercial sources and is loaded into the charge bottle without any pretreatment. The main industrial hazard in the handling of zinc arises from the danger of spontaneous ignition of finely divided zinc metal and zinc residues. These zinc products should be stored in small quantities in a cool, dry, and well-ventilated area away from acute fire hazards such as open flames and powerful oxidizing agents. Since zinc is a heavy metal poison, respirators should be worn when dusting is encountered, and good hygienic practices should be employed at all times when handling the metal or its compounds. |
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