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Shah, K.S. (author)
The focus of this thesis is on new detection technologies that can be used in advancing nuclear medicine modalities, particularly positron emission tomography (PET). Several detection technologies are covered in this thesis. First, new Ce3+ doped rare earth trihalide scintillators that can be used in advancing PET imaging are discussed. Here,...
doctoral thesis 2010
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Van der Laan, D.J. (author)
Monolithic scintillator detectors are very promising for high-resolution high-sensitivity PET. These detectors consist of several cubic centimetres of scintillating material coupled on one or more sides to position-sensitive avalanche photo-diode (APD) arrays. The coordinates of the entry point of an incoming gamma photon are estimated from the...
doctoral thesis 2009
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Maas, M.C. (author)
Positron emission tomography (PET) is a technique for imaging the 3-dimensional distribution of radio-labelled molecules in vivo. This technique plays an increasingly important role in preclinical research involving mice and rats. The small dimensions of these animals impose stringent requirements on both the image resolution and the sensitivity...
doctoral thesis 2008
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Seravalli, E. (author)
The main aim of radiotherapy techniques is to deliver the dose to the target volume while sparing as much as possible the healthy tissue. Dose verifications prior the treatment of the patient are mandatory in order to guarantee high accuracy to the treatment. We have developed a 2D dose imaging system for dose delivery verification in hadron...
doctoral thesis 2008
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Birowosuto, M.D. (author)
In this dissertation, we present bromide and iodide scintillators which have been investigated for the past four years. Three major groups of compounds were studied; lanthanide trihalides LnX3, (pseudo)-elpasolites M2ALnX6 and ternary halides AmLnnXo where M and A are alkali cations, Ln is a rare earth cation and X is a halide anion. Some...
doctoral thesis 2008
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Ballarini, M. (author)
Optically Stimulated Luminescence (OSL) dating is a tool used in Quaternary Geology for assessing ages of depositional mineral grains such as quartz, feldspars and zircons. In particular, OSL showed to be exceptionally robust and reliable for dating quartz samples. Such a technique has been successfully applied in the age range of 1.000 up to...
doctoral thesis 2006
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Idris, H.H.E. (author)
doctoral thesis 2005
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Van Vuure, T.L. (author)
Future high luminosity spallation neutron sources put strenuous demands on detector performance. This research has focused on applying the Gas Electron Multiplier (GEM) to meet most criteria, most notably mm spatial resolution, 1 MHz local countrate (per pixel) and 70% efficiency for 0.18 nm neutrons. The choice for this detector type was made...
doctoral thesis 2004
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Perego, R.C. (author)
Two novel neutron-based analytical techniques have been treated in this thesis, Neutron Resonance Capture Analysis (NRCA), employing a pulsed neutron source, and Neutron Incoherent Scattering (NIS), making use of a cold neutron source. With the NRCA method isotopes are identified by the isotopic-specific resonances observed in the neutron...
doctoral thesis 2004
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Sidorenko, A. (author)
doctoral thesis 2004
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Farahmand, M. (author)
Ionising radiation causes a wide variety of effects in biological targets. In experimental microdosimetry these effects are studied by investigating the statistical distribution of energy deposition events at the microscopic level employing a Tissue-Equivalent Proportional Counter (TEPC). A TEPC is usually designed with a cavity of a few...
doctoral thesis 2004
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Van Loef, E.V.D. (author)
Scintillators have been used for decades to make ionising radiation visible. Either by direct observation of the light flash produced by the material when it is exposed to radiation, or indirect by use of a photomultiplier tube or photodiode. Despite the enormous amount of commercially available scintillators, the ideal scintillator that...
doctoral thesis 2003
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Schaart, D.R. (author)
Abstract not available
doctoral thesis 2002
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Sonsky, J. (author)
Radiation detectors are used in a variety of fields to sense X-rays and y-rays, visible, UV and IR photons, neutrons or charged particles. With their help, advanced medical diagnostics can be performed (e.g. X-ray radiography, computed tomography, fluoroscopy), material research can undergo a rapid development (e.g. X-ray microanalysis, X-ray...
doctoral thesis 2002
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Gelsema, S.J. (author)
doctoral thesis 2001
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Van der Kolk, E. (author)
doctoral thesis 2001
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Marsman, M. (author)
The optical characteristics of the Ce3+ ion are largely determined by the geometry of the direct environment of the cerium-ion, and are often very sensitive to changes in this environment. These changes are for example periodic changes because of thermal movements of the atoms in the grid, but also because of static changes such as an optical...
doctoral thesis 2001
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Allier, C.P. (author)
In this thesis a new design is presented for the position-sensitive detection of radiation with sub-millimeter spatial resolution. It consists of a matrix of scintillation crystals encapsulated in well-type silicon sensors. The wells can be realised by means of deep reactive ion etching of a silicon wafer. Scintillation crystal material can be...
doctoral thesis 2001
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Clarijs, M.C. (author)
Since their discovery, now more than one hundred years ago, x-rays and radioactivity have been used in many applications: from medical care to process industry. We are now, however, more aware than ever of the harmful effects they can have on the human body. More sensitive detectors, better shielding of users and improvement of radiation sources...
doctoral thesis 2001
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van den Berg, F.D. (author)
doctoral thesis 2000
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