Range studies using a new chemical film technique

The formation and stripping of corrosion films produced by immersion of metal foils of Cu, Ag, Au, Sn, or Pb in organic solvents containing corrosive agents such as iodine or bromine have been studied using a radioactive tracer technique. The data show that the formation and stripping of metal–halogen films may be a suitable method for the peeling of layers from 0.5–30 μg/cm 2 metal.The film technique has been applied for Cu and Au, using iodine in chloroform as the corrosive agent and potassium iodide as the stripping solution for Cu, whereas bromine in carbon tetrachloride or bromine vapor was used as the corrosive agent for Au, with chloroform as the stripping agent. Experimental range data of 24 Na, 32 P, and 42 K in gold at energies higher than 100 keV are reported and compared with theory.