Energy of ions (recoil nuclei) channeled along definite directions in crystals is transferred to the lattice electrons mainly. In NaI(Tl)-type scintillators, this leads to increasing the light yield from ∼10% to ∼100% when compared with the yield for electrons of the same energy. Taking into account this effect at processing data of DAMA/NaI experiments in Gran Sasso, which had demonstrated the...

DAMA is searching for rare processes by developing and using several kinds of radiopure scintillators: in particular, NaI(Tl), liquid Xenon and CaF 2 (Eu). The main results are here summarized with particular attention to the investigation of the WIMP annual modulation signature.

We investigate a hypothesis that energy accumulation and the subsequent release in NaI(Tl) may lead to pulse-like events few-keV regime, phenomenon suggested by crystal manufacturing company Saint-Gobain, who provided crystals for DAMA-LIBRA. While we observed delayed long-lasting light emission 3" after exposing it UV light, consists primarily of single photons are uncorrelated with each other...

BACKGROUND Cadmium zinc telluride (CZT) solid-state detectors have been recently introduced in the field of nuclear medicine in cardiology and breast imaging. The aim of the current study was to evaluate the performance of the novel detectors (CZT) compared to that of the routine NaI(Tl) in bone scintigraphy. A dual-headed CZT-based camera dedicated originally to breast imaging has been used, a...

This thesis is an interdisciplinary investigation of small animals consisting of two parts. First, a comparison of NaI(Tl) and CsI(Tl) pixilated scintillating crystals will be presented based on results of resolution tests performed using 5 " diameter Hamamatsu 5800 PSPMTs. Second, application of the gamma ray detectors will be assessed using a biological model. The biological model chosen to a...

Microstructured optical fibers containing alkali halide scintillation materials of CsI(Na), CsI(Tl), and NaI(Tl) are presented. The scintillation materials are grown inside the microstructured fibers using a modified BridgmanStockbarger technique. The x-ray photon counts of these fibers, with and without an aluminum film coating are compared to the output of a collimated CdTe solid state detect...