Centrifuge method of fabrication of target-sources for in-beam electron spectroscopy

Some materials are not amenable to vacuum deposition or mechanical rolling for the fabrication of uniform thin targets needed in some nuclear physics experiments. The methods described herein permit the use of powders to make targets in the thickness range 0.5 to approx. 5 mg cm-2 in a reliable and reproducible manner. The retrieval efficiency is > 50% of material used, which is ideal for expensive enriched isotopes. Equipment, technique, and measurements on finished targets are discussed. (orig.)