Fission Fragment Damage to Crystal Lattices. Dislocation Formation

Journal Article · Tue Sep 11 04:00:00 EDT 1962 · Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences

DOI:https://doi.org/10.1098/rspa.1962.0167· OSTI ID:4803300

Bowden, F. P.; Chadderton, L. T.

The disorder in the molecular array of a crystal lattice caused by a fission fragment has been studied by high-resolution electron microscopy. Disturbances in the (201) fringes of platinum phthalocyanine have been observed and a limited theoretical interpretation of these disturbances suggests that complex dislocation arrays are formed over an area which is easily determined. In particular there is evidence that dislocation dipoles can remain behind in a crystal after fission fragment bombardment. Molecular planes are shown to curve inward toward the localized regions of damage. Observations made on the optical absorption spectra of copper and platinum phthalocyanine, both irradiated and unirradiated, are also described. The technique of irradiating thin crystals with fission fragments and observing the resultant damage in the electron microscope has been extended to other materials. In more patterns on overlapping crystals of molybdenum trioxide there is further evidence of a curvature of the molecular planes near regions of damage and in molybdenum disulfide dislocations resulting from irradiation are revealed by diffraction contrast. There is evidence that the radiation damage to the crystal lattice can be due to both thermal and displacement spikes and their relative importance is dependent on the nature of the crystal.

• Research Organization: Cambridge Univ., Eng.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-029463
• OSTI ID: 4803300
• Journal Information: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences, Journal Name: Proceedings of the Royal Society. A. Mathematical, Physical and Engineering Sciences Journal Issue: 1337 Vol. 269; ISSN 1364-5021
• Publisher: The Royal Society Publishing
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
BEAMS
CONFIGURATION
COPPER COMPOUNDS
CRYSTALS
DEFECTS
DEFORMATION
DIFFRACTION
DISLOCATIONS
ELECTRON MICROSCOPY
FISSION PRODUCTS
IRRADIATION
LATTICES
LIGHT
MOLECULES
MOLYBDENUM OXIDES
MOLYBDENUM SULFIDES
ORGANOMETALLICS
PHTHALIC ACID
PHTHALOCYANINES
PLATINUM COMPOUNDS
RADIATION EFFECTS
SPECTRA
THERMAL STRESSES
TRANSIENTS