An electron ejected from the nucleus of a decaying atom. Although beta particles can be stopped by a thin sheet of aluminum, they can penetrate the dead skin layer, potentially causing burns. They can pose a serious direct or external radiation threat and can be lethal depending on the amount received. They also pose a serious internal radiation th [..]

Electron emitted from the nucleus of a radioactive isotope. Also see alpha particle and gamma rays.

An electron emitted by an unstable nucleus, when a neutron decays into a proton and an electron. In some cases, beta radiation consists of positrons ("antielectrons" which are identical to e [..]

Electron with positive or negative charge emitted by a nucleus or elementary particle during beta decay or produced by a nuclear reaction. Depending on the charge of the emitted electron this is also [..]

(Or β particle.) Physically indistinguishable from the electron (or positron) but usually restricted to products in nuclear reactions (beta decay). The term was coined by Ernest Rutherford, who discov [..]

A charged particle (with a mass equal to 1/1837 that of a proton) that is emitted from the nucleus of a radioactive element during radioactive decay (or disintegration) of an unstable atom. A negatively charged beta particle is identical to an electron, while a positively charged beta particle is called a positron. Large amounts of beta radiation m [..]

A charged particle of very small mass emitted spontaneously from the nuclei of certain radioactive elements. Most (if not all) of direct fission products emit (negative) beta particles. Physically, th [..]

A charged particle emitted from a nucleus during certain types of radioactive decay, with a mass much smaller than that of a proton or a neutron. A negatively charged beta particle is identical to an [..]

An electron or positron. The term is generally applied to an electron or positron emitted in radioactive beta decay.

A particle emitted from an atom during radioactive decay. Beta particles are generally electrons (with negative charge) but may be positrons.

A charged particle emitted from a nucleus during radioactive decay, with a mass equal to 1/1837 that of a proton. A negatively charged beta particle is identical to an electron. A positively charged b [..]

High-energy electron emitted as ionizing radiation from a decaying nucleus; also known as a beta ray

A fast moving electron ejected from a certain type of unstable nucleus. A β particle is stopped by a few millimetres of aluminium. They are ionising particles, but not as strongly ionising as α (alpha [..]

The beta particle has the form of a high speed negatively charged electron (or a positively charged electron in the case of the positron). In beta decay (electron emission) a neutron in the nucleus is [..]

(particles) An energetic electron or positron produced as the result of a nuclear reaction or nuclear decay.

A charged particle emitted from a nucleus during radioactive decay, with a mass equal to 1/1837 that of a proton. A negatively charged beta particle is identical to an electron. A positively charged b [..]

An electron emitted from the nucleus of a radioactive atom.

An electron given off by an unstable nucleus (Lesson 25)

A beta particle  is:  a particle of nuclear radiation that is a fast electron. Animated gif: click here It has a mass of 0.000055 u (see atomic mass unit) Being of tiny mass (even on a nuclear scale) [..]

an electron emitted during radioactive decay.

High energy POSITRONS or Electrons ejected from a disintegrating atomic nucleus.

A beta particle is an energetic electron given off by atoms when the atoms have too much energy. Beta particles do not travel very far, but travel farther than alpha particles. Beta particles are typi [..]

a charged electron emitted during certain types of radioactive decay, such as beta decay