The production of another particle is also forbidden because of both particles (electron-positron) together do not carry enough mass-energy to produce heavier particles. The production of only one photon is forbidden because of conservation of linear momentum and total energy. Electron–positron annihilation occurs when a negatively charged electron and a positively charged positron collide.When a low-energy electron annihilates a low-energy positron (antiparticle of electron), they can only produce two or more photons (gamma rays). One of best known processes is electron-positron annihilation. A collision between any particle and its antiparticle partner is known to lead to their mutual annihilation. Since matter and antimatter carry an immense amount of energy (due to E = mc 2), their mutual annihilation is associated with production of intense photons ( gamma rays), neutrinos, and sometimes less-massive particle–antiparticle pairs. That means a proton has positive charge while an antiproton has negative charge and therefore they attract each other. Send us feedback.Matter – Antimatter Annihilation When a positron (antimatter particle) comes to rest, it interacts with an electron, resulting in the annihilation of the both particles and the complete conversion of their rest mass to pure energy in the form of two oppositely directed 0.511 MeV photons.Īs was written, a particle and its antiparticle have the same mass as one another, but opposite electric charge, and other differences in quantum numbers. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'assimilation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Amber Smith, Discover Magazine, 19 Oct. 2022 Probiotics have several benefits, including assisting your dog in digestion, assimilation, and maintenance of a strong immune system. Aatish Taseer Richard Mosse, New York Times, 3 Nov. 2023 The history of Al-Andalus, like that of Germany in the 1930s, reminds us how feeble a protection cultural assimilation is against the primordial scream for a limpieza de sangre. 2022 Both works depict how racial violence might be veiled by the rhetoric of assimilation. 2022 But without the efforts of people like Zubel, that history risks being sucked into the vacuum of assimilation and migration. Laura Jane Standley, The Atlantic, 30 Dec. and Canada stole Native American children from their families and placed them in residential or boarding schools under the guise of assimilation and support. 2023 Members of suddenly landless tribes scattered, with many moving from their former reservations to cities under federal relocation policies aimed at forcing assimilation. Karina Brown, Anchorage Daily News, 7 Jan. Recent Examples on the Web Historians say King never saw integration as assimilation – urging people of color to act like White people.
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