Lattice Defects of Quartz Induced by Fast Neutron Irradiation

スポンサーリンク

概要

• 論文の詳細を見る

• Lattice defects in natural and synthetic quartz crystals induced by an exposure to fast neutron irradiation ranging from 1×10^<19>〜1.5×10^<20> nvt were studied by x-ray and transmission electron microscopy methods. A quantitative strain analysis based on the x-ray divergent beam method yielded the principal strains and their directions as a function of radiation dose. Major differences with regard to the magnitude and directions of the strains were found between crystals cut parallel to the basal (00.1) plane (z-cut) and those cut perpendicular to it (x-cut), while virtually no difference was observed between natural and synthetic crystals. A close correlation was established between the alignment of clusters rich in interstitial silicon atoms directly observed by transmission electron microscopy, and the strain distribution disclosed by the x-ray method. The results were interpreted in terms of a mechanism of dynamic crowdions giving rise to the formation of clusters of interstitial atoms aligned in directions relative to the open screw channels of the quartz structure. At large radiation doses interaction of the densely populated clusters occurred which appeared to be aided by thermal spikes and which resulted in the formation of a stable network of lattice defects. Crystals irradiated 1×10^<20> nvt still exhibited a considerable degree of crystallinity, as evidenced by the extinction contour lines seen in the electron microscope.

• 東北大学の論文

著者

• Weissmann Sigmund

  College Of Engineering Rutgers The State University

• Imura Toru

  The Institute For Solid State Physics Tokyo University

• NAKAJIMA Koichi

  The Research Institute for Iron, Steel and Other Metals

• WISNEWSKI Stanley

  Bell Telephone Laboratories

• Nakajima Koichi

  The Research Institute For Iron Steel And Other Metals

関連論文

• Lattice Defects of Quartz Induced by Fast Neutron Irradiation
• Sub-Boundaries in Aluminium Single Crystals
• Change in Laue Diagram of Aluminium Single Crystal by Cold-Working
• Relation between Deformation and Integrated Intensity of X-Ray in Aluminium Single Crystals
• X-Ray Study of the Effect of Solute Atoms on Deformation Stacking Faults in Face-Centred Cubic Solid Solutions
• Defect Structure and Density Decrease in Neutron-Irradiated Quartz
• Positron Annihilation in Copper-Aluminium Alloy
• Scratch Hardness. II : X-Ray Investigation of Structural Change
• Stacking Faults in Copper-Nickel Alloys
• X-Ray Study of Cold-Worked Metal Single Crystals
• Study of Cold-Working by Microfocussing X-Ray. I : Fine Structure of Laue Spot
• Fermi Surfaces of Copper-Aluminum Alloys by Positron Annihilation

もっと見る 閉じる

スポンサーリンク