Fig. 9: Dependence of positron trapping coefficient on helium-to-vacancy ratio. | npj Materials Degradation

Fig. 9: Dependence of positron trapping coefficient on helium-to-vacancy ratio.

From: Understanding early-stage radiation damage in nuclear alloys through positron annihilation and semi-empirical modeling

Fig. 9

Positron trapping coefficients are plotted against the estimated nHe/nV ratios in irradiated samples. The data reveal a near-exponential decrease in trapping efficiency with increasing helium concentration in vacancy clusters, reflecting the reduced open volume available for positron trapping.

Back to article page