The positron was the first evidence of antimatter and was discovered when Anderson allowed cosmic rays to pass through a cloud chamber and a lead plate. A magnet surrounded this apparatus, causing particles to bend in different directions based on their electric charge.

In August 1932, Anderson recorded the historic photograph of a positively charged electron (now known as a positron) passing through the lead plate in the cloud chamber. It was definitely a positively charged particle, and it was traveling upwards.

They published a description of the first positron-imaging device to record three-dimensional data of the brain in their 1953 paper Localization of brain tumors with positron emitters in Nucleonics XI. This was the beginning of positron emission tomography.

He called the antielectron a "positron", for its positive charge and published his results in the journal Science, in a paper entitled The apparent existence of easily deflectable positives (1932). The discovery was confirmed soon after by Occhialini and Blacket, who in 1934 published Some photographs of the tracks of penetrating radiation in ...

1999年12月2日 · The positron was the first short-lived particle to be created out of empty space. It is a prelude to the high-energy physics that blossomed after the Second World War.

The positron, the antiparticle of the electron, was discovered in two steps. The first and crucial one was by Carl D. Anderson, who in 1932 concluded the existence of a positive particle of electronic mass (positive electron) from the tracks left by cosmic rays in a cloud chamber and in 1936 was awarded the Nobel Prize in Physics for it.

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 composition of cosmic rays (1932).

2020年11月24日 · This chapter deals with the discovery of the positron, the antiparticle of the electron. The positron was first discovered and reported by Carl Anderson and soon thereafter by Patrick Blackett and Giuseppe Occhialini.

The positron - the antimatter counterpart of the electron - was discovered in a cloud chamber in 1932. The particle is still making tracks today

THE existence of free positive electrons or positrons was first reported by me in September 19321, from cosmic ray experiments carried out at the California Institute of Technology.