Preparation of Thick, Uniform Foils for Range and Range Straggle Measurements

  • J. M. Anthony


Thick, uniform targets were needed for part of a study of the range and range straggle of energetic (E ≥ 1 MeV/amu) heavy ions. This paper will discuss a method for producing these targets by vacuum evaporation, with a geometry chosen to yield highly uniform targets. Thickness is determined by weighing, and uniformity is measured by comparing the energy loss of alpha particles through different portions of the target. Cu, Ag, and Pb targets have been prepared, with thicknesses up to 9 microns (~ 10 mg/cm2) and uniformities ≤ ± 1%.


Alpha Particle Target Height Target Frame Target Diameter Mass Saving 


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  1. (1).
    Arnison, G. T. J., AWRE Report No. 0–32/67, Atomic Weapons Research Establishment, Berkshire, England, 1967.Google Scholar
  2. (2).
    Ziegler, J. F., Helium Stopping Powers and Ranges in All Elements, Pergamon Press, New York, 1977.Google Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • J. M. Anthony
    • 1
  1. 1.A. W. Wright Nuclear Structure LaboratoryYale UniversityNew HavenUSA

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