Positron

Positron is an elementary particle with a tiny mass and a positive elementary charge. It represents the positively charged counterpart of the electron'. Positrons are created only during artificial radioactive transformations.

The positron was first discovered by irradiating aluminum with particles α: 2713Al + 42α → 3015P + 10n a 3015P → 3014Si + 01e

If an α particle hits the aluminum nucleus, it is transformed into an isotope of phosphorus due to the emission of a neutron. This in turn immediately decays into a silicon isotope, while the nucleus emits a positron.

Articles

 * Elektron-pozitronové páry
 * Záření beta
 * Positron emission tomography