Figure 6

(a) The positron lifetime τ1, τ2 and (b) intensity I1, I2 for the fabricated thin and thick sample, and (c) the calculated average lifetime τav for different samples.
(a) The positron lifetime τ1, τ2 and (b) intensity I1, I2 for the fabricated thin and thick sample, and (c) the calculated average lifetime τav for different samples.