On positronium-like state in F-centres of potassium chloride

✍ Scribed by P. Hautojárvi; R. Nieminen; P. Jauho

• Book ID: 104544082
• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 435 KB
• Volume: 57
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220570111

✦ Synopsis

Abstract

The trapping of positrons in F‐colour centres in KCl is investigated in some model calculations. The wave function of the bound state of the positron and F‐centre is determined in various approximations with and without the electron‐positron correlation, and annihilation parameters are evaluated using this function. It is suggested that the screening of the electron‐positron interaction in the bulk of the crystal has a strong influence on the trapping by promoting the localization of a neutral positronium‐like state in the vacant anion site. In this case agreement with experiments is obtained.