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On positronium‐like state in F‐centres of potassium chloride
Author(s) -
Hautojárvi P.,
Nieminen R.,
Jauho P.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220570111
Subject(s) - positronium , positron , trapping , atomic physics , bound state , annihilation , wave function , ion , electron , state (computer science) , crystal (programming language) , physics , potassium , function (biology) , chemistry , nuclear physics , quantum mechanics , ecology , organic chemistry , algorithm , computer science , biology , programming language , evolutionary biology
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.