Ai. Bolozdynya et al., HIGH-PRESSURE XENON ELECTRONICALLY COLLIMATED CAMERA FOR LOW-ENERGY GAMMA-RAY IMAGING, IEEE transactions on nuclear science, 44(6), 1997, pp. 2408-2414
A high pressure xenon scintillation drift chamber with 30 cm diameter
field of view has been built and tested as a two-dimensional imaging c
amera for low energy gamma-rays. Experiments demonstrate that the came
ra can be also operated in an electronically collimated mode as a thre
e-dimensional imaging Compton camera. A spatial resolution of 25 mm is
measured for a 140 keV point-like source placed 10.5 cm in front of t
he camera without any collimator. The resolution is limited by the int
rinsic resolution of the 19 channel readout system which is based on 8
0 mm diameter phototubes. A way to improve the imaging performance is
discussed.