Positron effective mass in silicon

Defect Complexes in Silicon: Electronic Structures and Positron Annihilation

In silicon processing technology one of the most important current objectives is to achieve a controlled impurity doping in the crystal. Point defects and defect complexes present in the crystal influence in an important way the electrical activity and the diffusion properties of the dopants. In this thesis, defect complexes in silicon are studied by using quantum-mechanical electronic-structur...

Highly Efficient Silicon Photomultiplier for Positron Emission Tomography Application

A silicon photomultiplier (SiPM fabricated and characterized. The SiPM was (Separation of Absorption, Charge and Multipl which was optimized for blue light detection positron emission tomography (PET). The achieved high geometric fill factor of 64% and a low brea about 22V, while the temperature dependence of b is only 17mV/°C. The gain and photon detection device achieved were also measured un...

Low-temperature positron-lifetime studies of proton-irradiated silicon.

Study of Silicon Photomultipliers for Positron Emission Tomography (PET) Application

A relatively new photodetector, the silicon photomultiplier (SiPM), is well suited for PET applications. It has similar sensitivity and gain to the industry standard photomultiplier tube (PMT), but has advantages such as smaller size and insensitivity to magnetic field. These properties make this detector an active area of research in the PET field. I will study a simplified setup, comprised of...

Hydrogen- and helium-implanted silicon: Low-temperature positron-lifetime studies.