• Thumbnail for Positronium
    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...
    22 KB (2,616 words) - 19:42, 4 September 2024
  • Thumbnail for Positronium hydride
    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...
    9 KB (984 words) - 20:35, 20 May 2024
  • 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...
    3 KB (348 words) - 01:20, 27 August 2024
  • contains one or more exotic atoms. Di-positronium, two bound positronium atoms Positronium hydride, a positronium atom bound to a hydrogen atom "Exotic...
    12 KB (1,482 words) - 18:32, 28 August 2024
  • Thumbnail for Singlet state
    positron in positronium can also have identical or parallel spin orientations, which results in an experimentally-distinct form of positronium with a spin 1...
    11 KB (1,647 words) - 21:09, 8 July 2024
  • example, the radius of positronium is approximately 2 a 0 {\displaystyle 2\,a_{0}} , since the reduced mass of the positronium system is half the electron...
    7 KB (1,014 words) - 21:51, 31 March 2024
  • Thumbnail for Onium
    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...
    3 KB (329 words) - 19:12, 22 February 2024
  • Thumbnail for Positron annihilation spectroscopy
    positronium. Positronium is a metastable hydrogen-like bound state of an electron and a positron which can exist in two spin states. Para-positronium...
    10 KB (1,198 words) - 12:33, 17 October 2023
  • 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...
    16 KB (2,198 words) - 23:42, 25 May 2024
  • order to efficiently form positronium (Ps) - even at cryogenic temperatures in Ultra-high vacuum (UHV). A cloud of positronium emerging from the target...
    10 KB (964 words) - 15:08, 2 September 2024
  • Thumbnail for Antimatter
    Theory of gravity on antimatter Di-positronium – Exotic molecule consisting of two atoms of positronium Positronium hydride – Exotic molecule consisting...
    77 KB (8,019 words) - 21:44, 3 September 2024
  • Thumbnail for Annihilation
    diagram showing the mutual annihilation of a bound state electron positron pair into two photons. This bound state is more commonly known as positronium....
    12 KB (1,374 words) - 22:31, 2 May 2024
  • it induces oscillations between positronium and mirror positronium. Positronium could then turn into mirror positronium and then decay into mirror photons...
    27 KB (3,046 words) - 15:45, 4 June 2024
  • Thumbnail for Electron–positron annihilation
    scattering List of particles Meitner–Hupfeld effect Pair production Positronium L. Sodickson; W. Bowman; J. Stephenson; R. Weinstein (1970). "Single-Quantum...
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  • called "the father of positronium" because his most significant work is the prediction of the existence of positronium. Positronium is the bound state of...
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  • Examples of such atoms include positronium ( e−   e+ ), muonium ( e−   μ+ ), and "true muonium" ( μ−   μ+ ). Of these positronium and muonium have been experimentally...
    32 KB (2,981 words) - 14:20, 18 July 2024
  • Thumbnail for Quarkonium
    particle and its own antiparticle. The name "quarkonium" is analogous to positronium, the bound state of electron and anti-electron. The particles are short-lived...
    22 KB (1,944 words) - 17:00, 23 June 2024
  • Thumbnail for J/psi meson
    by analogy with positronium, which also consists of a particle and its antiparticle (an electron and positron in the case of positronium). OZI rule List...
    17 KB (1,827 words) - 08:51, 5 September 2024
  • Thumbnail for Muonium
    muonium ( μ+ e− ) is more similar to atomic hydrogen ( p+ e− ) than positronium ( e+ e− ). Its Bohr radius and ionization energy are within 0.5% of hydrogen...
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  • Thumbnail for Lepton
    other particles to form various composite particles such as atoms and positronium, while neutrinos rarely interact with anything, and are consequently...
    42 KB (4,314 words) - 13:26, 16 June 2024
  • Thumbnail for Antihydrogen
    source is generated by the charge exchange reaction between Rydberg positronium atoms -- produced via the injection of a pulsed positron beam into a...
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  • Thumbnail for Baryon
    Hadrons Others Atomic nuclei Atoms Exotic atoms Positronium Muonium Tauonium Onia Pionium Protonium Superatoms Molecules Hypothetical...
    30 KB (3,490 words) - 03:51, 9 March 2024
  • Thumbnail for Positron
    within a solid material. Beta particle Buffer-gas trap List of particles Positronium Positronic brain "2022 CODATA Value: electron mass". The NIST Reference...
    34 KB (3,758 words) - 14:58, 2 September 2024
  • Thumbnail for Chemical symbol
    tennessine: see above) Vi: vinyl Exotic atoms: Mu: muonium Pn: protonium Ps: positronium Hazard pictographs are another type of symbols used in chemistry. List...
    64 KB (2,126 words) - 15:03, 30 July 2024
  • Thumbnail for Laser
    News reported that there was speculation about the possibility of using positronium annihilation to drive a very powerful gamma ray laser. David Cassidy...
    113 KB (12,669 words) - 02:30, 27 August 2024
  • drifting through space will encounter one another and occasionally form positronium atoms. These structures are unstable, however, and their constituent...
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  • Thumbnail for Universe
    other particles to form various composite particles such as atoms and positronium. The electron governs nearly all of chemistry, as it is found in atoms...
    158 KB (16,435 words) - 06:47, 5 September 2024
  • Hadrons Others Atomic nuclei Atoms Exotic atoms Positronium Muonium Tauonium Onia Pionium Protonium Superatoms Molecules Hypothetical...
    46 KB (5,524 words) - 21:35, 23 July 2024
  • Thumbnail for Massachusetts Institute of Technology
    Lander was one of the principal leaders of the Human Genome Project. Positronium atoms, synthetic penicillin, synthetic self-replicating molecules, and...
    213 KB (19,659 words) - 00:33, 7 September 2024
  • Thumbnail for Hubert Reeves
    from McGill University in 1956 with a thesis entitled "Formation of Positronium in Hydrogen and Helium" and a PhD degree at Cornell University in 1960...
    11 KB (773 words) - 19:09, 21 August 2024