Introduction: There are many areas where accurate prediction of X-ray dose is important. A particularly relevant example is in clinical radiography, where patients are subjected to what is considered a known radiation dose to various sensitive organs. It is common practice to take X-ray spectra dictated by programs such as SpekCalc[1] or through simulation via Monte Carlo techniques such as GEANT4[2]. These spectra are then used for the simulation of patients in X-ray dose studies. This arises as it is often difficult and expensive to accurately characterise the spectrum of an X-ray source while modelling software is a simple and fast alternative. The aim of the study was to determine the reliability of such methods and if there is a potential for errors in dose prediction.

The materials used in detection of high energy photons are of primary importance in the construction of efficient, cost effective and sensitive detectors. Current research into Perovskites for solar cell technology has stimulated interest in their potential alternative uses, one of which is in direct photon conversion radiation detectors, owed primarily to their high-Z elemental composition twinned with exceptional charge carrier transport properties. Here, the Perovskite CsPbBr 3 has been synthesised through solution growth. The raw CsPbBr 3 was a granular powder which was formed into disks of 8 mm diameter and 1-2 mm thickness by two methods: 1). the powders were pressed into pellets using a hydraulic press or 2). sealed in a quartz ampoule under vacuum and then melted and quenched to form a polycrystalline solid which was cut to size. Metallic contacts were deposited on the front and back faces to permit charge collection. The results from the pressed devices are promising, particularly given that the production method is cost effective, repeatable and scalable. The solid-from-melt devices show similar performance but further development is required to optimise the production method.

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