Annealing of radiation damage in artificial sodium silica glass has been studied by absorption spectroscopy for different radiation sources (fission fragments produced by n,f reactions, alpha decays produced by n, α reactions, and 2 MeV electrons) as a function of annealing time and temperature. The annealing observed can be described best by a single exponential function
A(t) = a exp (− αt)
with an Arrhenius type temperature dependence of the annealing coefficient α
α(T) = α0 exp (− EA/kT)
For the three different radiation sources similar activitation energies EA were deduced from the data. Possible annealing processes are discussed.