OBSERVATIONS OF FISSION FRAGMENT DAMAGE IN SOME CRYSTALS

Journal Article · Fri Mar 01 04:00:00 EST 1963 · J. Phys. Soc. Japan

OSTI ID:4659206

Izui, K; Suzuki, H

Electron microscopic observations were carried out on fission fragment- irradiated crystals such as molybdenum oxide, germanium, copper-- aluminum alloy, and aluminum-copper--uranium alloy. Tracks of fission fragments were observed in molybdenum oxide but none in the other crystals. A number of small defect regions were observed as dark spots in germanium and as dark and light spots or sometimes loops in copper--aluminum alloy. The densities of the defect regions increased with increasing dose of fission fragments passing through the crystals. None of them was observed in aluminum-- copper-- uranium alloy. It was concluded that the track registrations in molybdenum oxide are a result of the evaporation due to the energy dissipated in electron excitations by fission fragments and that small defect regions in germanium and copper-aluminum alloy are displacement spikes due to the nuclear collisions. Separations of the defect regions are discussed in terms of the calculated mean free path for Rutherford collisions. The natures of displacement spikes are also discussed. (auth)

• Research Organization: Japan Atomic Energy Research Inst., Tokyo
• NSA Number: NSA-17-037604
• OSTI ID: 4659206
• Journal Information: J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 18: Suppl. III
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM ALLOYS
COLLISIONS
CONFIGURATION
COPPER ALLOYS
CRYSTALS
DEFECTS
DIFFUSION LENGTH
ELECTRON MICROSCOPY
ELECTRONS
ENERGY LOSSES
EVAPORATION
EXCITATION
FISSION
GERMANIUM
LATTICES
LOSSES
MEAN FREE PATH
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM OXIDES
NUMERICALS
RADIATION DOSES
RADIATION EFFECTS
URANIUM ALLOYS