Alpha particles are positively charged particles consisting of two protons and two neutrons, essentially a helium-4 nucleus.
Emitting during certain types of radioactive decay, such as alpha decay, they possess relatively low penetrating power, typically stopped by a sheet of paper or human skin.
While they can be hazardous if emitted within the body, they are less penetrating than beta or gamma radiation.
Alpha particles play a crucial role in nuclear physics and are encountered in various scientific and industrial applications, including certain types of smoke detectors.
