The total fraction of the current transmitted and its angular distribution have been measured
when an electron beam is incident normally on evaporated films of aluminium, copper, silver
and gold. The range of mass-thickness ρx investigated was such that plural scattering …

Whipple's exact solution of the grain boundary diffusion problem is evaluated numerically
and the results presented in graphical form suitable for immediate application to the
commoner types of experimental measurement of D́, the grain boundary diffusion coefficient …

An explanation is given of the dependence of the relative viscosity on the size distribution of
the suspended spheres, an effect recently observed by Ward and Whitmore.(1) It is shown
theoretically that if the spheres are of very diverse sizes, the relative viscosity is (1-c)-2.5 for …

Page 1. British Journal of Applied Physics Evaporated carbon films for use in electron microscopy
To cite this article: DE Bradley 1954 Br. J. Appl. Phys. 5 65 View the article online for updates
and enhancements. Related content The measurement of the thickness of thin carbon films AW …

Experience with the scanning electron microscope has shown that there are fields of
application where this instrument has distinct advantages over the conventional
transmission microscope (with or without replicas) and the reflexion electron microscope …

A study of the plastic deformation of metals by hard indenters shows that the indentation
hardness is essentially a measure of the plastic yield stress of the metal. With pyramidal
(and conical) indenters the hardness, because of geometric similarity, is independent of the …

A theoretical relationship between the concentration and the sedimentation velocity of non-
flocculated suspensions of particles is derived. It is shown that the settling velocity relative to
that of a single particle in the suspension is (1-c) β where β is a function of particle shape …

Radiation absorbed by the free carriers in a semiconductor gives rise to an increase in the
carrier temperature and a change of mobility. In n-type indium antimonide at liquid helium
temperatures the effect is very pronounced and has been made the basis of a detector for …

Accurate measurements of the structure-cell parameters of bismuth telluride, Bi 2 Te 3, have
been made using annealed powders and etched rods cut from single-crystal ingots.
Previously reported anomalies in the X-ray powder intensity data are found to originate …

The thermal conductivities of fused quartz and of crystalline quartz (heat-flow at 90 to the
optic axis) have been measured by steady-state plate methods; the former over the range-
150 to 50 C, and the latter at 28 C. The most probable thermal conductivity values of these …