Microdosimetry. II. Use of secondary electron emission to simulate two target models

A potential technique to analyse related energy depositions in two adjacent tissue-equivalent volumes is described. The technique is based on secondary electron emission from the two surfaces of a micrometer thick foil. The foil should thus simulate two nm thick slabs separated a distance equal to the thickness of the foil. Calculations of the coincident probability, i.e. the probability that any secondary electrons are emitted from the front surface when at least one secondary electron is emitted from the exit surface, is presented to show the potential of the technique. An experimental arrangement is also discussed.