Positron Annihilation of Defects in Metals and Alloys

Author

Hollis P. Leighly, Missouri University of Science and Technology

Abstract

The existence of the positron, bþ, was predicted by Dirac [1] in 1930 and verified experimentally by Anderson [2] in 1933. a positron is a positively charged particle having the same mass as an electron. It is the antimatter analog of the electron. Sources of positrons are isotopes such as 22Na, 64Cu, 58Co, 68Ge, 11C, and 44Sc. with the exception of 64Cu, all these positron source isotopes have a smaller atomic weight than the stable isotopes for the corresponding element. Characteristically the lighter isotopes of an element tend to undergo radioactive decay by emitting positively charged particles during this process. These positively charged particles that may be emitted are positrons, protons, deuterons, and a particles. Because this chapter deals only with positrons, the emission of all other positively charged particles will be ignored.

Recommended Citation

H. P. Leighly, "Positron Annihilation of Defects in Metals and Alloys," Analytical Characterization of Aluminum, Steel, and Superalloys, pp. 661 - 676, Taylor and Francis Group; Taylor and Francis, Jan 2005.

The definitive version is available at https://doi.org/10.1201/9781420030365-18

Department(s)

Materials Science and Engineering

International Standard Book Number (ISBN)

978-142003036-5;978-082475843-1

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Taylor and Francis Group; Taylor and Francis, All rights reserved.

Publication Date

01 Jan 2005