The identification of vacancy and interstitial loops in neutron irradiated molybdenum

Transmission electron microscopy has been used to investigate point defect aggregates which were resolvable as dislocation loops in neutron irradiated and annealed molybdenum. The so-called formal analysis was employed in determining the direction and sense of their Burgers vectors. In foils containing a wide spectrum of loop sizes, both vacancy and interstitial type loops have been identified with Burges vectors of the type a/2⟨111⟩.