IMAGING MULTIENERGY GAMMA-RAY FIELDS WITH A COMPTON SCATTER CAMERA

Multi-energy gamma-ray fields have been imaged with a ring Compton sca tter camera (RCC). The RCC is intended for industrial applications, wh ere there is a need to image multiple gamma-ray lines from spatially e xtended sources. To our knowledge, the ability of a Compton scatter ca mera to perform this task had not previously been demonstrated. Gamma rays with different incident energies are distinguished based on the t otal energy deposited in the camera elements. For multiple gamma-ray l ines, separate images are generated for each line energy. Random coinc idences and other interfering interactions have been investigated. Cam era response has been characterized for energies from 0.511 to 2.75 Me V. Different gamma-ray lines from extended sources have been measured and images reconstructed using both direct and iterative algorithms.