Theory of positron annihilation in vacancies in concentrated disordered alloys

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5782214

Prasad, R; Benedek, R; Bansil, A

A theory of the two-photon momentum density for positrons trapped in vacancies in concentrated substitutional binary alloys has been developed within the framework of the KKR-CPA method. Our ultimate objective is to obtain information regarding the local environment of vacancies in alloys by comparison of predicted momentum distributions with the results of 2D-ACAR experiments. The theory is formulated in terms of muffin-tin wavefunctions and real-space path operators for the electrons and the vacancy-trapped positron. Partial results are presented for a vacancy in pure Cu.

• Research Organization: Argonne National Lab., IL (USA); Northeastern Univ., Boston, MA (USA). Dept. of Physics
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5782214
• Report Number(s): CONF-850169-6; ON: DE85010267
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOY SYSTEMS
ALLOYS
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BINARY ALLOY SYSTEMS
COPPER
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
INTERACTIONS
LEPTONS
METALS
POINT DEFECTS
POSITRONS
TRANSITION ELEMENTS
TRAPPING
VACANCIES