Defect accumulation behavior in iron irradiated with energetic ions and electrons at ∼80 K

Defect accumulation behavior in α-Fe irradiated with 0.5-2.0 MeV ¹H, ⁴He, ¹²C, ²⁰Ne and ⁴⁰Ar ions and 2.0 MeV electrons was studied. The change in electrical resistivity of the specimen at ∼80 K was measured as a function of particle fluence in order to obtain the defect production curve. After irradiation, the defect recovery spectra were measured up to ∼250 K. From the experimental results, the defect production cross-section, the recombination volume, the damage efficiency (the ratio of the experimental defect production cross-section to the calculated one) and the fraction of the stage-I recovery were derived for each irradiation. Primary Knock-on Atom (PKA) energy dependence of the damage efficiency, the recombination volume and the fraction of the stage-I recovery is discussed.