  The unfolding of a gamma ray spectrum experience many difficulties due to
noise in the recorded data, that is based mainly on the change of photon energy
due to scattering mechanisms (either in the detector or the medium), the
accumulation of recorded counts in a fixed energy interval (the channel width
of the detector) and finally the statistical fluctuation inside the detector.
In order to deal with these problems, a new method is developed which
interpolates the ideal spectrum with the use of special designed derivative
kernels. Preliminary simulation results are presented and show that this
approach is very effective even in spectra with low statistics.
