Parapositronium | Article about parapositronium by The Free Dictionary
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The state of positronium in which the positron and electron have antiparallel spins.
References in periodicals archive
Other positrons capture electrons from gas atoms thus producing orthopositronium and parapositronium (in ratio 3:1).
12] s, which is a few orders of magnitude less than those of the positron and parapositronium.
T]Ps [arrow right] nothing, because products of decay passed into the mirror Universe can not be detected; (2) the ratio between orthopositronium and parapositronium
numbers will decrease from [sup.