RI* particle
91particle physicist — noun see particle physics * * * particle physicist, a person who studies particle physics …
92particle board — fiberboard fiberboard n. a type of wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets, calle also {particle board}. Syn: fibreboard, particle board. [WordNet 1.5] …
93particle physics — noun Date: 1946 a branch of physics dealing with the constitution, properties, and interactions of elementary particles especially as revealed in experiments using particle accelerators called also high energy physics • particle physicist noun …
94Particle in a one-dimensional lattice (periodic potential) — In quantum mechanics, the particle in a one dimensional lattice is a problem that occurs in the model of a periodic crystal lattice. The problem can be simplified from the 3D infinite potential barrier (particle in a box) to a one dimensional… …
95Particle Physics and Astronomy Research Council — The Particle Physics and Astronomy Research Council (or PPARC) was one of a number of Research Councils in the United Kingdom. It directed, coordinated and funded research in particle physics and astronomy for the people of the UK. It s head… …
96Particle zoo — In particle physics, the term particle zoo is used colloquially to describe a relatively extensive list of the known elementary particles that almost look like hundreds of species in the zoo.The situation was particularly confusing in the late… …
97Particle number operator — In quantum mechanics, for systems where the total number of particles may not be preserved, the number operator is the observable that counts the number of particles. The number operator acts on Fock space. Given a Fock state composed of single… …
98particle physics — the branch of physics that deals with the properties and behavior of elementary particles. Cf. high energy physics. [1945 50] * * * or high energy physics Study of the fundamental subatomic particles, including both matter (and antimatter) and… …
99particle — noun /ˈpɑːtɪkəl,ˈpɑːrtɪkəl/ a) A body with very small size; a fragment. b) An elementary particle or subatomic particle. See Also: part, particular, particulate …
100Particle, alpha — A tiny mass of material composed of two protons and two neutrons. Alpha particles do not travel very far from their radioactive source. They cannot pass through a piece of paper, clothes or even the layer of dead cells which normally protects the …
