Title :
From Luminescence Non-Linearity to Scintillation Non-Proportionality
Author_Institution :
Scobeltsyn Inst. of Nucl. Phys., Lomonosov Moscow State Univ., Moscow
fDate :
6/1/2008 12:00:00 AM
Abstract :
The problem of non-linearity of luminescence is reviewed on the basis of kinetic equations for concentrations and two-particle correlation functions. The reasons of time dependence of the rates of reactions between excitations are discussed. The non-linearity of luminescence and non-exponentiality of its decay is attributed to initial correlation between excitations created by photons, and to non-homogeneous spatial distribution of deposited energy. The case of excitation by ionizing particle is discussed. The equation for the scintillation yield and decay kinetics with account for either small energy losses (plasmons, excitons and electron-hole pairs) or large energy losses (delta-electrons and Auger cascade) is obtained.
Keywords :
Auger effect; electron-hole recombination; excitons; luminescence; plasmons; scintillation counters; Auger electrons; delta-electrons; electron-hole recombination; excitons; ionizing particle; kinetic equations; nonhomogeneous spatial distribution; nonlinearity luminescence; nonproportionality scintillation; photons; plasmons; two-particle correlation functions; Charge carrier processes; Energy loss; Excitons; Helium; Kinetic theory; Luminescence; Nonlinear equations; Plasmons; Scintillation counters; Spontaneous emission; Ionizing particles; luminescence; radioluminescence; scintillation detectors; scintillation non-proportionality;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2007.914367