Direct observation of the primary state of damage of ion-irradiated tungsten: I. Three-dimensional spatial distribution of vacancies
The results of an extensive field-ion microscope (FIM) investigation of the primary state of damage of ion-irradiated tungsten are presented. Two-pass zone-refined single crystals of tungsten were irradiated in situ, at less than or equal to 15 K, with a magnetically analyzed beam of various ions at a background pressure of (5 to 10)x10/sup -10/ torr in the absence of the imaging electric field. The value of the standard fluence was small enough (5 x 10/sup 12/cm/sup -2/) to guarantee that each depleted zone (DZ) detected was associated with a single projectile ion. After an irradiation each specimen was examined on an atom-by-atom basis employing the pulse field-evaporation technique.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AS02-76ER03158
- OSTI ID:
- 7084341
- Report Number(s):
- DOE/ER/03158-74; TRN: 80-019288
- Country of Publication:
- United States
- Language:
- English
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