Theory of positron annihilation in vacancies in concentrated disordered alloys

Conference · Tue Jan 01 00:00:00 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-31-109-ENG-38
• OSTI ID: 5782214
• Report Number(s): CONF-850169-6; ON: DE85010267
• Resource Relation: Conference: 7. international conference on positron annihilation, New Delhi, India, 6 Jan 1985
• Country of Publication: United States
• Language: English

Related Subjects

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