Scanning electron microscope imaging in liquids - some data on electron interactions in water.
The electron backscattering coefficient of liquid water has been determined for electrons in the energy range 15-30 keV using Quantomix capsules. Values of the mean atomic number for water estimated from a fit to the backscatter yield, the mean ionization potential of water and from Monte Carlo simulations, show that the scattering behaviour of water is not anomalous despite the effects of hydrogen bonding. Computations of the electron range, and of the mean depth for backscattering, in water as a function of incident beam energy show that water and vitreous ice are good media for imaging purposes.
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Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, U.S.A. djoy@utk.edu
Joy
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