X ray storage performance of KCl:Eu with high cumulated dose.

The effects of high cumulative radiation dose on the luminescence properties of KCl:Eu are investigated. Pellet samples of KCl:Eu were given doses of up to 200 kGy at the Louisiana State University Synchrotron facility. After synchrotron irradiation, samples were optically bleached and given a clinical dose of 2 Gy from a 6 MV medical linear accelerator.

The role of activator concentration and precipitate formation on optical and dosimetric properties of KCl:Eu(2+) storage phosphor detectors.

Purpose: The activator ion (Eu(2+) in KCl:Eu(2+)) plays an important role in the photostimulated luminescence (PSL) mechanism of storage phosphor radiation detectors. In order to design an accurate, effective, and robust detector, it is important to understand how the activator ion concentration affects the structure and, consequently, radiation detection properties of KCl:Eu(2+).

Methods: Potassium chloride pellets were fabricated with various amounts of europium dopant (0.

Determining molecule-carbon surface adsorption energies using molecular mechanics and graphene nanostructures.

Five model surfaces were developed using molecular mechanics with MM2 parameters. A smooth, flat model surface was constructed of three parallel graphene layers where each graphene layer contained 127 interconnected benzene rings. Four rough surfaces were constructed by varying the separation between a pair of graphene nanostructures placed on the topmost layer of graphene.