Definition

Noun: A type of radioactive decay in which an atomic nucleus transforms, emitting a beta particle (an electron or a positron) and a corresponding antineutrino or neutrino. This process changes a neutron into a proton, or a proton into a neutron, thereby transforming the element into a different one.

Usage

This term is used specifically in the fields of nuclear physics and chemistry to describe a fundamental subatomic process. - It is typically used as a non-count noun (e.g., "the process of beta decay"). - It can be modified to specify the type of particle emitted: beta-minus decay (emission of an electron) or beta-plus decay (emission of a positron).

Examples

• The instability of carbon-14 is due to beta decay.
• In beta-minus decay, a neutron is converted into a proton.
• Scientists studied the beta decay spectrum to test the theory.

Advanced Usage

• Double beta decay: A rare nuclear process where two neutrons undergo beta decay simultaneously.
  • The experiment was designed to search for neutrinoless double beta decay.
• Allowed beta decay: A decay that satisfies standard selection rules for angular momentum and parity.
• Forbidden beta decay: A decay that violates these standard rules to some degree.

Variants and Related Words

• Beta particle (n): The high-energy, high-speed electron or positron emitted during beta decay.
• Beta radiation (n): The stream of beta particles emitted during radioactive decay.
• Decay constant (n): A probability constant characterizing the rate of decay, applicable to beta decay.
• Beta emitter (n): A radioactive substance that undergoes beta decay.

Synonyms

• β-decay (The Greek letter symbol is a direct synonym).
• Beta disintegration (A less common, more technical synonym).

Related Phrases

• To undergo beta decay: The verb phrase describing the action of a nucleus.
  • Tritium undergoes beta decay to become helium-3.
• Beta decay rate: The speed or probability at which beta decay occurs for a given isotope.
• Beta decay energy: The total energy released in a beta decay event.

Noun

1. radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle