spallation

Thân thiện

A scientist observes spallation in a particle detector.

Definition

Noun: 1. (Physics) A nuclear reaction process: A process in which a nucleus, struck by a high-energy particle, fragments or "shatters" into numerous smaller particles and fragments. It is not a simple splitting (like fission) but a violent disintegration.

Usage Examples

• Noun:
  • The laboratory studies spallation to understand the behavior of matter under extreme conditions.
  • Cosmic rays can cause spallation when they collide with atoms in the atmosphere.
  • Some theories suggest spallation was a source of certain light elements in the universe.

Advanced Usage

• Spallation source: A type of particle accelerator facility that generates neutrons by bombarding a heavy metal target with protons, causing spallation. This is a primary method for producing intense neutron beams for scientific research.
  • The research reactor was replaced by a more powerful spallation source.

Variants and Related Words

• Spall (verb/noun): To break or chip into fragments. In geology and materials science, it refers to the breaking off of fragments from a solid body due to impact or stress.
  • The high-pressure shockwave caused the rock face to spall.

Synonyms

• Fragmentation
• Disintegration (in the specific nuclear physics context)

Related Phrases/Concepts

• Nuclear fragmentation: A closely related term often used interchangeably with spallation, emphasizing the breaking apart of the nucleus.
• Cosmogenic nuclide production: A process in nature where spallation reactions caused by cosmic rays create new isotopes in materials, such as in rocks or the atmosphere.

Học thuật

Noun

1. (physics) a nuclear reaction in which a bombarded nucleus breaks up into many particles
   • some astronomers believe that the solar system was formed by spallation when the sun was a very young star