A Facile Route To Bulk High-z Polymer Composites For Gamma Ray Scintillation

摘要

Two classes of bulk high-Z polymer composites were prepared, which exhibit scintillation properties for γ-radiation detection.rnThe detection of high energy y rays is important to public health and security. Inorganic high-Z (Z = atomic number) compounds have been extensively studied for γ-ray detection. However, the application of these semiconductors has serious drawbacks such as the need for ancillary cooling systems, modest stopping powers, high cost, radiation intolerance and poor energy resolution. For example, ZnCdTe can be operated at room temperature, but it is challenging to grow large-size perfect crystals. NaI(Tl) scintillation is a good room temperature detector, but its energy resolution is limited. Bulk germanium provides high energy resolution but requires operation at liquid nitrogen temperature. It has been a significant challenge to develop γ-ray detectors with high sensitivity, good energy resolution, and low fabrication cost.