Positronium (Ps) is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium. Unlike...

Positronium hydride, or hydrogen positride is an exotic molecule consisting of a hydrogen atom bound to an exotic atom of positronium (that is a combination...

Di-positronium, or dipositronium, is an exotic molecule consisting of two atoms of positronium. It was predicted to exist in 1946 by John Archibald Wheeler...

contains one or more exotic atoms. Di-positronium, two bound positronium atoms Positronium hydride, a positronium atom bound to a hydrogen atom "Exotic...

positron in positronium can also have identical or parallel spin orientations, which results in an experimentally-distinct form of positronium with a spin 1...

nomenclature. Positronium is an onium which consists of an electron and a positron bound together as a long-lived metastable state. Positronium has been studied...

For example, the radius of positronium is approximately 2a0{\displaystyle 2\,a_{0}}, since the reduced mass of the positronium system is half the electron...

positronium. Positronium is a metastable hydrogen-like bound state of an electron and a positron which can exist in two spin states. Para-positronium...

energy levels of positronium yields α−1 = 137.034(16). Measurements of α can also be extracted from the positronium decay rate. Positronium decays through...

diagram showing the mutual annihilation of a bound state electron positron pair into two photons. This bound state is more commonly known as positronium....