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Positronium in Mixed Molecular Crystals
Author(s) -
Goworek T.,
Rybka C.,
Wawryszczuk J.
Publication year - 1978
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.2220890132
Subject(s) - positronium , pyrene , molecule , momentum (technical analysis) , atomic physics , physics , materials science , molecular physics , chemical physics , positron , nuclear physics , quantum mechanics , finance , astrobiology , economics , electron
Positronium formation in mixed organic crystals is investigated. The size of the free volume in the neighbourhood of the strange molecule influences the lifetime of the ortho‐positronium and the width of the momentum distribution of the para‐positronium. A systematic change of positronium formation probability with the position of the substituted group in naphtalene derivatives is observed. In pyrene host crystals it is found that after addition of guest molecules a distortion of the whole momentum spectrum appears.