Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1881358 | Radiation Measurements | 2006 | 6 Pages |
The differential evolution (DE) algorithm and its application to deconvolution of OSL decay curves into first order components is presented. The algorithm is very fast and robust in finding a global minimum in the problem under consideration. Falling into local minima is a typical problem with deterministic fitting methods, like the Levenberg–Marquardt (LM) algorithm.The algorithm was adapted to form a hybrid evolutionary-linear algorithm, HELA. The evolutionary part of the algorithm was applied only to the decay constants (optical detrapping cross-sections) of the exponential components. For given decay constants, the intensities were calculated using a generalised linear regression method and further improvements were introduced to enhance the efficiency of the algorithm.After finding a solution using the HELA algorithm the parameters obtained were fed into the LM algorithm, providing a nearly automatic procedure for fitting OSL decay curves with a sum of exponential components which in turn may prove very useful in estimating absorbed doses for different components.