Gamma spectroscopy and optoelectronic imaging with hybrid photon detector

Pr3+-doped complex oxide single crystal scintillators

“…The LY was measured using a hybrid photomultiplier (DEP PPO 75 B type) under 137 Cs 662 keV energy line excitation (for more details see [12]).…”

Fabrication of Transparent Cerium‐Doped Lutetium Aluminum Garnet Ceramics by Co‐Precipitation Routes

“…Among these Ce‐doped scintillators, Ce 3+ ‐doped Lu 3 Al 5 O 12 garnet (LuAG:Ce) single crystal scintillators are characterized by the relatively high density (6.73 g/cm 3 , 94% of bismuth germanate (BGO)), the leading fast decay component of about 50 ns (six times faster than BGO) and the emission peak between 500 and 550 nm (similar spectral region as BGO emission) which can be well coupled with the silicon photodiodes 6 . All these properties suggest that LuAG:Ce scintillators can be successfully employed in modern and sophisticated medical imaging equipments as PET, SPECT, or gamma imaging cameras 5,7 . However, the growth of LuAG single crystals is very expensive, and it is difficult to produce large‐sized LuAG single crystals 8–10 .…”

“…6 All these properties suggest that LuAG:Ce scintillators can be successfully employed in modern and sophisticated medical imaging equipments as PET, SPECT, or gamma imaging cameras. 5,7 However, the growth of LuAG single crystals is very expensive, and it is difficult to produce large-sized LuAG single crystals. [8][9][10] For optically isotropic materials, powder processing technology offers an attractive alternative to single crystal growth for fabrication of large transparent optical ceramics.…”

Further readout electronics development for the ISPA gamma camera

“…The active sensor chip, originally developed at CERN for high-energy physics [7] and later implemented on ISPA-tubes, is a matrix of 128×16 C-type detector cells (conventional rectangular ion implant diodes) of 50×500 µm 2 , manufactured in a commercial 1 µm SACMOS technology process. The readout chip is connected by solder bumps to a 300 µm thick silicon sensor of the same geometry, allowing high gain, high speed and low noise.…”

“…Some collimator designs were also studied to evaluate the system spatial resolution and sensitivity. After the first encouraging results in the gamma ray imaging field [7,8], reasons to provide easier set-up and utility of the ISPA-tube for clinical studies and basic research, lead us to redesign new electronics. The new compact readout system under development is able to control Omega3 and Alice1 [9] chips.…”