Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 590, Issue 1-3, Pages 122-125Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2008.02.084
Keywords
radioactive target; (231)Protactinium; electron beam heating; vacuum deposition; radiation protection
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(231)Pa is an alpha-emitter belonging to the actinide group. Because it is both toxic and highly radioactive, it requires special precautions during target fabrication. The isotopic material was available in the chemical form of dried nitrate. It had to be converted to Pa-oxide, which is our most favourable source material for the preparation of actinide targets. Targets in the thickness range between 70 and 100 mu g/cm(2) were produced by cold crucible electron beam evaporation-condensation on different backings and target frames. (C) 2008 Elsevier B.V. All rights reserved.
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