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rvs mmm tat apnea TT eee Approved For Release@2000/68/4N Acid REP 9614079 3KG00300400002-9 was suspected that atoms of the penetrating object might leave some traces in the obstacle material that, in turn, could be revealed by tracing detectors - a technique used frequently in the past in nuclear physics. A typical detector looks like an ordinary plastic foil. When an atom moves through the foil it looses, due to its motion, some of the surrounding electrons. Such an ionized object inflicts microscopic damage along the trace of its passage. After exposure, this damage can be enlarged by chemical etching and viewed under a microscope. Two bottles were prepared. The bigger one, made of clear glass, was approximately 14. cm high, 22 cm in diameter. It was a standard bottle used in hospitals for transfusions of saline solution. It’can be distinguished by a tight rubber plug with a long rubber skirt that folds out on the bottle's neck providing a firm and difficult to remove lid. Inside the bottle were: a pellet containing a radioactive a source (1yCi 24lam) , an a-Fe Méssbauer absorber, two pieces of high temperature superconductor samples, four pieces of trace detector material (each about 2mm thick), a metal sample, a small, 3cm by lcm ampule containing a liquor sample, ten yellow and ten white medical tablets, and an ordinary bolt nut. A thin cotton thread was tied to the nut. The other end of the thread extended outside the bottle, between the rubber plug and glass, and was tied to the bottle's neck. The fragile superconducting samples were wrapped and sealed in several layers of the trace detector foil. 12 Approved For Release 2000/08/11 : CIA-RDP96-00792R000300400002-9