منابع مشابه
Optical spectroscopy of atomic and molecular positronium
Positronium (Ps) is a purely leptonic hydrogen-like atom formed from an electron and a positron. Since the interactions of electrons and positrons are thought to be almost entirely electromagnetic, precision measurements of the Ps energy levels should constitute a good test of QED theory. The ultimate precision is limited by the rapid annihilation of the various Ps states and the number of Ps a...
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When the atoms of a dimer remain most of the time very far apart, in so-called longrange molecular states, their mutual interaction is ruled by plain atomic properties. The highresolution spectroscopic study of some molecular excited states populated by photoassociation of cold atoms (photoassociative spectroscopy) gives a good illustration of this property. It provides accurate determinations ...
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ژورنال
عنوان ژورنال: Nature
سال: 1965
ISSN: 0028-0836,1476-4687
DOI: 10.1038/208214a0