ELECTRON MICROSCOPE INVESTIGATION ON THE NATURE OF TRACKS OF FISSION PRODUCTS IN MICA

Abstract

Specimens of different micas were examined by the electron microscope, after suitable bombardment to clarify some aspects of the damage caused to crystals by fission products, Biotite, muscovite, artificial fluorophlogopite and muscovite annealed at 900 C (i.e. above the point of loss of crystallization water) were observed after covering with a thin evaporated uranium layer and irradiation in a reactor up to an integrated flux of 10 to the 15th power thermal neutrons/ sq. cm. Tracks appeared on every specimen but biotite; the tracks being larger in muscovite (240 angstrom, thinner in fluorophlogopite (150 angstrom) and still more in dehydrated muscovite (115 angstrom). No tracks were observed in biotite, likely because of too rapid recovery effects. Recovery effects were,observable in muscovite. No recovery effects were observed in fluorophlogopite nor in dehydrated muscovite. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1961
Accession Number
AD0262178

Entities

People

  • A. Ferro
  • A. Mojoni
  • G. Bonfiglioli

Tags

DTIC Thesaurus Topics

  • Coverings
  • Crystallization
  • Crystals
  • Electron Microscopes
  • Electrons
  • Fission Products
  • Microscopes
  • Neutrons
  • Phyllosilicates
  • Recovery
  • Thermal Neutrons

Readers

  • Materials Science and Engineering.
  • Nuclear and Radiation Engineering.
  • Solar Physics

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene