Positron - Wikipedia
网页The positron or antielectron is the particle with an electric charge of +1 e, a spin of 1/2 (the same as the electron), and the same mass as an electron. It is the antiparticle (antimatter counterpart) of the electron. When a positron collides with an electron, annihilation occurs.
Positron | Antimatter, Annihilation, Electron | Britannica
网页2024年9月3日 · Positron, positively charged subatomic particle having the same mass and magnitude of charge as the electron and constituting the antiparticle of a negative electron. The first of the antiparticles to be detected, positrons were discovered by Carl David Anderson in cloud-chamber studies of the.
What are Positrons? - Scientific American
网页August 1, 1935. 1 min read. What are Positrons? Discovery of a Positively Charged Counterpart to the Negative Electron, That Can Apparently be Created and Destroyed, Dirac's Theory, All Space...
Positron physics - University of Michigan
网页Positron physics. As the antimatter counterpart to the electron, the positron has the opposite charge and magnetic moment, and the same mass (511.0034 keV/c 2 ) and spin as the electron. The positron is stable in vacuum (average lifetime 10 21 years), whereas in condensed matter it typically remains only a short time (10 -10 sec) before ...
Positrons | ALPHA Experiment - CERN
网页The Positron (= positive electron), e+, is the antimatter counterpart of the electron, and was the first antimatter particle that was discovered. Positrons occur naturally at the β+ decay of radioactive material.
Electrons and Positrons - subtleatomics.com
网页Positrons The positron is an example of a particle with similar mass to an electron (~511KeV), but displaying "positive" rather than "negative" behaviour in response to an electric field. The observed difference in "charge" behaviour is expected to be due to a different electromagnetic field configuration compared to the electron.
Still making tracks: Eighty years of the positron - CERN
网页2013年3月15日 · Positrons are the basis for positron emission tomography (PET) scanners, which are used to create three-dimensional images of processes inside the body. Carl Anderson’s discovery in a cloud chamber continues to make tracks 80 years later.
POSITRON中文(简体)翻译：剑桥词典 - Cambridge Dictionary
网页noun [ C ] physics specialized uk / ˈpɒz.ɪ.trɒn / us / ˈpɑː.zɪ.trɑːn / Add to word list. an extremely small piece of matter with a positive electrical charge, having the same mass …
Definition, Discovery, Mass of Positron in Amu with Videos - BYJU'S
网页A positron is a subatomic particle whose mass is the same as that of electron and numerically equal but in contrast to an electron, it is a positively charged particle. The collision of a low-energy positron and a low-energy electron results in the formation of two or more gamma rays photons and this process is known as electron-positron ...
Positrons Galore - Physics
网页2013年4月3日 · The 400,000 positrons they have measured constitute the largest set of cosmic-ray positron data, increasing the total world sample a hundredfold. In addition, the range of the reported positron fraction extends out to a few hundred GeV, beyond the reach of previous experiments flown on high-altitude balloons [2] or space shuttles and satellites ...
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