ELECTRON MICROSCOPIC STUDY OF FISSION FRAGMENT DAMAGE IN MOLYBDENITE CRYSTALS

Journal Article · Mon Apr 01 04:00:00 EST 1963 · J. Phys. Soc. Japan

DOI:https://doi.org/10.1143/JPSJ.18.467· OSTI ID:4707003

Izui, K; Fujita, F E

Electron microscopic observation was carried out on fission fragment- irradiated molybdenite crystals. Tracks of fission fragments in the crystals were observed as continuous straight lines and linear arrays of spots and rings. From the change of their image contrasts in the tilting experiment and the disturbances in the moire patterns around the tracks, it was found that the track consists of a narrow non-uniform cylindrical region associated by some dotted blister-like swellings. The origin of such blister-like regions may be interpreted by either of the non-uniform solidification in the temperature spiked region along the path of fission fragment or more probably the displacement spike effect by the knock-ons with energies higher than about 500 ev. Bent and forked tracks resulting from nuclear collisions between fission fragments passing through the lattice and atoms on the lattice sites were observed and analysed. Interaction between dislocation lines and the tracks was observed, indicating that strong stress fields around the tracks cause the slip motion of the dislocations by elastic interaction. (auth)

• Research Organization: Japan Atomic Energy Research Inst., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-024022
• OSTI ID: 4707003
• Journal Information: J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 18
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATOMS
COLLISIONS
CRYSTALS
CYLINDERS
DEFECTS
DISLOCATIONS
FISSION PRODUCTS
INTERACTIONS
LATTICES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM SULFIDES
PARTICLE TRACKS
SOLIDIFICATION
STRESSES
TRANSIENTS