"alpha particle" prevod sa engleskog na srpski

Množina: alpha particles

A positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes.
The nuclei of a helium (with two neutrons and two protons each) that are discharged by radioactive decay of many heavy elements, such as uranium-238 and plutonium-239.
Positively charged, high-energy particle emitted from the nucleus of a radioactive atom. It is one of the products of the spontaneous disintegration of radioactive elements (see radioactivity) such as radium and thorium, and is identical with the nucleus of a helium atom— that is, it consists of two protons and two neutrons. The process of emission, alpha decay, transforms one element into another, decreasing the atomic (or proton) number by two and the atomic mass (or nucleon number) by four.
Because of their large mass alpha particles have a short range of only a few centimeters in air, and can be stopped by a sheet of paper. They have a strongly ionizing effect (see ionizing radiation) on the molecules that they strike, and are therefore capable of damaging living cells. Alpha particles traveling in a vacuum are deflected slightly by magnetic and electric fields.