alpha ray

Thân thiện

A scientist observes an alpha ray source in a laboratory.

Definition

1. Noun:
   • A stream of alpha particles: An "alpha ray" is a type of ionizing radiation consisting of a fast-moving stream of alpha particles (helium-4 nuclei) emitted by certain radioactive substances.

Usage Examples

• Noun:
  • The experiment involved measuring the penetration of an alpha ray through thin materials.
  • Alpha rays have a very short range in air due to their strong ionizing power.

Advanced Usage

• Scientific Context: The term is often used in nuclear physics, radiation protection, and historical descriptions of radioactivity. It is synonymous with "alpha radiation."
  • Rutherford used alpha rays from radium in his famous gold foil experiment.

Variants and Related Words

• Alpha particle (n): The individual helium nucleus that constitutes an alpha ray.
  • Each alpha particle consists of two protons and two neutrons.
• Alpha radiation (n): A more formal term for alpha rays.
  • The device can detect alpha, beta, and gamma radiation.

Synonyms

• Alpha radiation: The radiation composed of alpha particles.

Notes on Meaning

• The term "alpha ray" is somewhat historical. In modern scientific contexts, "alpha radiation" or "alpha particles" are more commonly used, though "alpha ray" remains correct and understood. It specifically refers to the or of these particles.

Học thuật

Noun

1. the radiation of alpha particles during radioactive decay

Từ đồng nghĩa

• alpha radiation