Positron trapping centers

What is it about?

Due to Gamma irradiation nasicon analogues show positron trapping centers.

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Why is it important?

This paper reports the results of our investigations on the effect of gamma-irradiation on Nasicon (sodium superionic conductor) compounds in the low absorbed radiation dose range. An attempt is made in understanding the nature of positron trapping in the Nasicon materials. Variations of the positron annihilation parameters indicate that the gamma-iradiation is causing changes in the electron density distribution. A two-state trapping model is used to find the value of positron lifetime. Variations of lifetime parameters indicate that the irradiation is effecting the localization and delocalization of electrons near trapping centers.

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