Dictionary of Material Science and High Energy Physics Part 7 pot

... ina flow field.kinetic energy A form of energy associatedwith motion. Every moving particle has kinetic energy. The kinetic energy of a non-relativisticparticle with mass m and speed v is equal ... =m1m2m1+m2is the reduced mass for particles of mass m1 and m2, and r = r1− r2are therelative position vectors of particles 1 and 2.Suitable sets of center -of- mass coordinates canbe similarly ... energy levels of this extra electron lie close to the con-duction band of silicon (∼ 0.05 eV below) and can thus be excited to the conduction band and added to the number of charge carriers. Someuses of...

... conservation of energy and momentum.density of modes The number of modes of the radiation field in an energy range dE. Thedensity of modes is a function of the boundaryconditions ofthe spaceunder ... models,the description of the properties of a many-bodyquantum-mechanical state may be consideredin terms of a single particle moving in sometype of potential well created by other parti-cles. However, ... scatter-ing potential. The s-wave phase shift can beexpanded in powers of 1/kR, where R is the ef-fective range and k is the momentum of the par-ticle in units of ¯h. For uncharged particles...

... shift). energy spectrum The set of energy eigen-states of a physical system. The set of possibleoutcomes of a measurement of the energy; alsoknown as the set of allowed energies. energy- time ... energy =rate of internalkinetic and potential energy in by convention−rate of internalkinetic and potential energy outby convention+net rate of heat ... closely spaced points and not onthe path between them.exchange energy Part of the energy of asystem of many electrons (or any other type of fermion) that depends on the total spin of thesystem....