Self-supporting carbon targets by e-gun evaporation

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Abstract

A successful technique to overcome the difficulties in preparing self-supporting carbon targets using isotopic carbon in powder form is described. Using this technique, targets up to thicknesses of 140 μg/cm2 were prepared by e-gun evaporation. Elemental purity, durability and uniformity of these targets have been tested using the protons from a Van de Graaff accelerator. Their performance has been compared with commercially available targets.

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Present address : Saba Institute of Nuclear Physics, Calcutta - 700064, India.

∗∗

Visitor from Accelerator Laboratory, University of Saskatchewan, Saskatoon, Sask., Canada S7N OWO.

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