FOUNDATIONS OF ELASTIC SHELL THEORY

Abstract

C O : P R LI IN RIE AN THE GEOMETRY OF A SURFACE Relationships between space and surface tensors and their derivatives in normal coor inates Deformation and strain Stress and couple result ts; equations of equilibrium The constitutive equations of the linear theory Remarks on the general theorems of the linear heoryAD -<+< *%$N AD-272 084Div. 25 U (TISTP/TL) Cornell U., Ithaca, N. Y. PHOTON ABSORPTION BY VALENCE ELECTRONS IN MG, CR, FE AND CO, by H. Kroger. Feb 62, 103p. incl. illus. tables, 59 refs. (Technical rept. no. 4) (Grant DA-ORD-37, Proj. 2810P) (AROD rept. no. 2810:4) Unclassified report No automatic release to Foreign Nationals. DESCRIPTORS: (*Photons, *Absorption, *Valence, *Electrons, Excitation, Density.) (X rays, Vacuum systems, Ultraviolet radiation, *Plasma physics, Oscillation, Metals, Optics, Photometers.) (Magnesium, Chromium, Iron, Cobalt, Nickel, Copper.) This analysis deals with experimental studies of the absorption of soft x-ray - vacuum ultraviolet radiations by metals. Since the energies of the incident photons are just insufficient to excite x-ray levels of the atoms, the most important mechanism for the removal of energy from the photon beam is interband excitation of valence electrons. The absorption of light in this frequency range should therefore yield some information about the electronic valence and conduction states of metals. The comparison of the optical absorption spectrum with all the characteristic electron energy losses of a metal is also of interest. (Author)