  Concentration of Cr in the Fe-rich alpha-phase, x, resulted from a phase
decomposition caused by an isothermal annealing at T = 415 and 450 C of a
non-irradiated (NR) Fe-Cr14 EFDA sample and that of a He-ions irradiated (IR)
one annealed at 415 C was determined with M\"ossbauer spectroscopy. The x-value
in the latter was by ~3 at% higher than the one in the NR-counterpart. The
activation energy for the phase decomposition in the NR-sample was 122 kJ/mol.
In the IR-sample its value was by 12 kJ/mol lower. Avrami exponents for the
NR-samples were close to 0.5, and that for the IR-sample had a value of about
1.
