Researchers at the University of California, Davis have developed a radiation detector for high energy photons that employs a transparent semiconductor with a high index of refraction to combine benefits of Virtual Frisch Grid devices and the readout of Cerenkov light.
Current radiation detectors are unable to provide high spatial accuracy, timing resolution, energy resolution and detection efficiency simultaneously and with the desired level of high performance. Image quality in PET scanners is desired to improve to detect smaller tumors or lesions, and the uncertainty of range verification in hadron beam radiotherapy is limiting its wide utilization. The location and source of radioactive threats cannot be assessed at great distances with hand-held devices, and detectors used in astrophysics and high-energy physics are sizeable and costly.
Researchers at the University of California Davis have developed a radiation detector for high energy photons that uses a transparent semiconductor (thallium bromide) possessing a high index of refraction. This detector allows the Position Sensitive Virtual Frisch Grid (PS-VFG) and Cerenkov light readouts to be combined. The PS-VFG style of semiconductor detector provides high energy resolution and high spatial resolution in three dimensions via an electronic signal. Due to the transparent nature of the selected semiconductor, the detector is also capable of detecting the promptly emitted Cerenkov photons optically. Combining these two readouts increases the overall performance of the radiation detector at a lower cost than current detection techniques.
Cerenkov detector, Frisch grid, Radiation detection, Semiconductor, PET, Hadron beam radiotherapy, Nuclear non-proliferation monitoring, Virtual Frisch Grid, Positron emission tomography, Particle physics, Astrophysics