Validity of repeated initial rise thermoluminescence kinetic parameter determinations

摘要: Abstract The validity of thermoluminescence (TL) glow curve analysis by repeated initial rise (initial slope) measurements has been studied computer simulation. Thermoluminescence described first order, second general one trap (GOT), and interactive TL kinetics, were investigated. In the simulation, each temperature increase decrease cycles contains a linear followed appropriate for “radiative” cooling, i.e. latter is approximated decreasing exponential. Plots showing activation energies, computed from simulated emission, against corresponding (mean) are readily compared with known values used to compute emission. From such plots it determined that technique provides reliable results only (1) single peak curves; or (2) curves containing peaks do not overlap; (3) lowest in multi-peak where well separated. cases valid use method, energy vs contain plateaux constant correspond value. Also, temperatures “correct” energies occur on low side normal curve, often below temperature. method gives incorrect results, and/or they Consequently, variety misleading “results” can be obtained when applied systems produce overlapping usual curve.