singlet-singlet annihilation

См. также в других словарях:

• Positronium — (Ps) is a system consisting of an electron and its anti particle, a positron, bound together into an exotic atom . Being unstable, the two particles annihilate each other to produce two gamma ray photons after an average lifetime of 125 ps or… …   Wikipedia

• Technicolor (physics) — Beyond the Standard Model Standard Model …   Wikipedia

• Scintillator — Scintillation crystal surrounded by various scintillation detector assemblies …   Wikipedia

• Meson — Mesons Mesons of spin 0 form a nonet Composition Composite Quarks and antiquarks Statistics Bosonic …   Wikipedia

• Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… …   Wikipedia

• Spin contamination — In computational chemistry, spin contamination is the artificial mixing of different electronic spin states. This can occur when an approximate orbital based wave function is represented in an unrestricted form – that is, when the spatial parts… …   Wikipedia

• Precision tests of QED — Quantum electrodynamics (QED), a relativistic quantum field theory of electrodynamics, is among the most stringently tested theories in physics.Precision tests of QED consist of measurements of the electromagnetic fine structure constant, α, in… …   Wikipedia

• Saison 1 de The Big Bang Theory — Série The Big Bang Theory Pays d’origine  États Unis Chaîne d’origine CBS Dif …   Wikipédia en Français

• UNIFICATION DES FORCES — L’ambition des scientifiques a toujours été de décrire des phénomènes variés comme des manifestations diverses de processus fondamentaux en nombre restreint. En physique, cette démarche a été couronnée de spectaculaires succès; la reconnaissance… …   Encyclopédie Universelle