| coul | coulomb |
|---|---|
| C/V | coulomb per volt |
| J/C | joules per coulomb |
| CID | Collision Induced Dissociation |
|---|---|
| CAD | Collision activated dissociation |
| MVC | motor vehicle collision |
| coulomb collision | <physics> An interparticle collision where the Coulomb's force (electrical attraction and repulsion) is the governing force. Coulomb collisions have a number of interesting properties, but these are better described in textbooks. The interaction of the charged particles with each other's electric fields results in deflections of the particles away from their initial paths. See: Coulomb's Law, electrostatic force. (21 Jun 2000) |
|---|
| coulomb | <physics> Standard unit of electric charge representing one mole of electrons. A single electron or proton has a charge of (+/-) 1.60217733E-19 coulombs, with an uncertainty of.30 ppm. Hence there are 6.2414E+18 electrons in a coulomb of electrons. (09 Oct 1997) |
|---|---|
| coulomb ionisation | <radiobiology> Ionisation produced by Coulomb's forces between a moving particle (projectile) and another particle it interacts/collides with (target). (09 Oct 1997) |
| coulomb's force | <radiobiology> See Coulomb's Law. Synonym: electrostatic force. (09 Oct 1997) |
| coulomb's law | <radiobiology> Force law governing the electrical interaction between charged particles. Force is proportional to (charge of first particle) (charge of second particle) / (square of separation between particles). Constant of proportionality depends on system of units used. (In SI units, it is 1/(4piepsilon_0), where epsilon_0 is the permittivity of free space, approx. 8.854 x 10^-12) (09 Oct 1997) |
| collision | <physics> Refers to the close approach of two or more particles, photons, atoms, nuclei, etc, during which such quantities as energy, momentum, and charge may be altered. More-or-less synonymous with scattering, except in scattering one generally thinks of one of the particles as being at rest, and the other colliding particles scatter from their initial direction of motion due to the collision. (09 Oct 1997) |
| collision cross-section | <radiobiology> Effective surface area of a particle when it collides with another, describes probability of collisions between the two particles. (09 Oct 1997) |
| collision frequency | <chemistry> The rate at which chemical species collide, used in theories of chemical kinetics. Also, the frequency with which gaseous molecules collide. (09 Oct 1997) |
| collision theory | <chemistry> A mathematical description of the number of collisions between molecules in a sample of matter per unit time, useful for predicting rates of reaction. (09 Oct 1997) |
| collision time | <radiobiology> Typical time which passes between two consecutive collision events for a given particle. Inverse of the collision frequency, equal to the mean free path divided by the particle's velocity. In plasmas, the (Coulomb) collision time decreases with increasing density, and increases with increasing temperature. (09 Oct 1997) |
| collision tumour | Two originally separate tumour's, especially a carcinoma and a sarcoma, that appear to have developed by chance in close proximity, so that an area of mingling exists. See: carcinosarcoma. (05 Mar 2000) |
| effective collision radius | <radiobiology> Effective size of a particle equal to the square root of (cross-section/pi). Determines the effective range of interaction of the particle. (09 Oct 1997) |
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