Interstitial content of radiation-damaged metals from precision X-ray lattice parameter measurements I. Principles of the measurements

✍ Scribed by Charles W Tucker Jr.; John B Sampson

• Publisher: Elsevier Science
• Year: 1954
• Weight: 832 KB
• Volume: 2
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(54)90063-2

✦ Synopsis

An X-ray method for determining the interstitial content of irradiated metals is suggested and analyzed. This approach offers the following advantages: (a) the X-rays "see" mainly the interstitial atoms since their effect outweighs that of vacancies by a 5 : 1 ratio, (b) the interpretation is straightforward and may be made quantitative, and (c) the method is sensitive since 0.01 atomic per cent, and perhaps less., of interstitials may be detected.

These conclusions are based on a combination of theory and experiment. The theory is based upon an elasticity interpretation which predicts Vegard's law and several other experimentally confirmed X-ray effects.

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The possibilities of the method are borne out by preliminary observations in this Laboratory of X-ray-detected lattice expansions of several neutron irradiated metals.