Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"NaI(Tl)"”.
-
Detector integration of severe accident management instrumentation for robotic applications at nuclear reactor facilities
… the PurpleAir Air-Quality (PA) sensor, and the NaI(Tl) scintillator were examined and their measurement parameters optimized. Optimization was done to satisfy mitigation requirements outlined in regulatory severe accident management guidelines (SAMGs). A software component (Severe Accident …
-
Studies of the Electron Neutrino Charged-current Interaction on $^{127}$I
… with lower statistical uncertainties, a 185-kg NaI[Tl] prototype detector, NaI$\upnu$E-185, was deployed by the COHERENT collaboration at the Spallation Neutron Source. To study electron neutrino charged-current interaction detection efficiencies, simulations were performed. To explore new …
-
CRYOGENIC DETECTION OF SCINTILLATION LIGHT WITH LARGE AREA SIPM ARRAYS FOR NEXT GENERATION NEUTRINO AND DARK MATTER EXPERIMENTS
… by dark matter direct-search experiments using NaI(Tl) crystal. The best example is DAMA, the only detector reporting a long-standing positive observation of dark matter. To confirm and to extend the physics reach of NaI(Tl)-based experiments, a new generation of dark matter detectors is needed. …
-
Reconstruction of the Spatial Distribution of Surface Activity Concentration for an In-Situ, Gamma-Ray, Truck-Borne Survey
… spectrometer, which contained four, standing, NaI(Tl) detectors. The Electron Gamma Shower code of the National Research Council (EGSnrc) was used to find the averaged activity concentration for a gamma-emitting disc source, with a radius at the threshold of the spectrometer sensitivity. In …
-
Measurement of the isovector giant quadrupole resonance in 208Pb using eleastic polarized photon scattering
… Scattered photons were detected in two large Nai(Tl) crystals. The polarization asymmetries clearly show the signature for interference between the isovector giant quadrupole resonance and the underlying electric dipole strength. The gross features of the IVGQR strength distribution were …
-
The measurement of the output spectrum of a cobalt 60 teletherapy unit
… Berger and Doggett on the response function of NaI(Tl) crystals, and was constructed such that its intervals were proportional to the square root of the photon energy. This provided more detail in the low energy region of the matrix. The curves of the output spectrum obtained from various …
-
The design and development of Prometheus 1: Rice University's coded aperture faint object gamma ray telescope
… 0.5$\sp{\prime\prime}$ x 2.0$\sp{\prime\prime}$ NaI(Tl) crystals, each optically separated from the remainder of the array independently viewed. Inflight calibration of the 121 individual PMTs will be handled by an on board computer in conjunction with LEDs attached to the crystals. The active …
-
Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
… designs are better than those obtainable with NaI(Tl), the scintillator detector material most often used in this energy range. The 3-D imaging capabilities of the detectors were studied using collimated 122 keV photons. Spatial resolution is better than the unit cell pitch in the x and y …
-
Development of a gamma ray telescope for online synovial dosimetry in boron neutron capture synovectomy
… were predicted, and the feasibility of using a NaI detector instead of an HPGe detector was also confirmed. Next, a telescope system was built in the radiation vault at LABA. A background peak overlapping the energy region of 478 keV photons was observed in the measured spectrum by a 10.2 cm x …
-
Searching for the low-energy enhancement in 91zR
… MeV has been discovered in several nuclei. Recently, a strong enhancement of M1 transitions in 90Zr has been predicted for -ray energies below 2 MeV in shell model calculations. In this work we explored the existence of the low-energy enhancement in the neighbouring 91Zr isotope with the …
-
The decay scheme of Kr⁸⁷
… measurements employed two integral line NaI(Tl) detectors with 3 in. diameter by 3 in. long crystals. Beta measurements were made using a 2 in. diameter by 1/2 in. long CaF₂(Eu) integral line detector. Both the gamma spectrum and the beta spectrum were found to be complex. Energy values …
-
Determining the Radon Emanation Coefficient for Soil Samples
… radium and radon and then counted using a NaI(Tl) detector to measure the radium activity using a 214Bi full-energy peak. The radon concentration was determined using an active radon monitor, the RAD7 which measures the alpha particles emitted from the radon progenies, 218Po and 214Po. The …
-
Fast Monte Carlo Simulation of ⁹⁰Y Bremsstrahlung using a Kernel-based Photon Source
… photons can be used for imaging and subsequently for absorbed dose estimation. Monte Carlo simulation is a reliable method to study bremsstrahlung imaging but it takes a long computation time as not all ⁹⁰Y disintegrations result in emission of a bremsstrahlung photon. Furthermore the electron …
-
Radiation exposure of human populations in villages in Russia and Belarus affected by fallout from the Chernobyl reactor
… the project (1991-2000). This included personal TLDs and individual whole body burden estimates of 137Cs by NaI(Tl) measurements. A method applicable for prospective as well as retrospective absorbed dose estimates has also been evaluated by using the optically stimulated luminescence in ordinary …
-
Sviluppo di un nuovo approccio per la quantificazione in tempo reale dell'attività dei radiofarmaci.
… multicanale accoppiato a uno scintillatore di NaI(Tl) nell'ambito di un progetto intern azionale chiamato SPEKTRO, in continua collaborazione con il team dell'azienda Georadis di Brno, Repubblica Ceca, per il monitoraggio dei rifiuti radioattivi. La seconda parte si concentra sullo sviluppo di …