Abstract
The vacancy structure of near-surface depleted zone (DZ), created by a single 30 keV 63Cu+ ion in a tungsten field-ion microscope (FIM) specimen, was determined with atomic resolution. Both the irradiation and pulse field-evaporation experiments were performed in situ at ≲11 K, so that the observed vacancy structure was unaltered by the long-range migration of self-interstitial atoms. The following basic physical quantities were measured: (1) the number of vacancies; (2) the dimensions; (3) the vacancy concentration; (4) the distribution of first-nearest-neighbor vacancy clusters; and (5) the radial-distribution function for the vacancies out to ninth-nearest neighbor. The values of these quantitieswere shown to be similar for both the near-surface DZ and DZs created in the bulk of the same specimen by 30 keV 63Cu+ projectiles.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 377-381 |
| Number of pages | 5 |
| Journal | Nuclear Instruments and Methods |
| Volume | 170 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Mar 15 1980 |
Funding
We present here a detailed analysis of the vacancy structure of a depleted zone (DZ) which was created in the near-surface region of a tungsten FIM specimen by the impact of a single 30 keV 63Cu ÷ projectile. A low dose irradiation was performed in situ under * This research was supported by the U.S. Department of Energy under Contract No. EY-76-S-02. * OOO Additional support was received from the National Science Founda-tion through the use of the technical facilities of the Mate-rials Science Center at Cornell University.
ASJC Scopus subject areas
- General Medicine