Results 1 - 10 of 740
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[en] This work describes the measurement of the resolution variation of a Ge(Li) detector as a function of irradiation position by a collimated gamma-ray beam. Also the resolution dependence has been measured as a function of the detector applied voltage, using collimated and non-collimated gamma-ray beam. (A.C.A.S.)
[pt]Neste trabalho descreve-se as medidas feitas da variacao da resolucao de um detetor Ge(Li) em funcao da posicao de irradiacao por um feixe colimado de radiacao gama. A dependencia da resolucao tambem foi medida em funcao da voltagem aplicada ao detetor utilizando-se feixes de radiacao gama colimados e nao colimados. (A.C.A.S.)
[en] In the last years there has been an increase of interest in diamond devices because of the promising applications in different field, such as high-energy physics, radiotherapy and biochemical applications. In particular, a new frontier is represented by the realization of full-carbon detectors characterized by graphite electrodes, which give to the devices considerable advantages like high radiation hardness, perfect mechanical adhesion and good charge collection properties. In this paper the manufacturing of full-carbon devices and their detection performances are illustrated and compared to a reference diamond detector characterized by traditional electrodes.
[en] A method to determine radon emanation coefficients of building materials based on measuring the sample activity in equilibrium with its emanation and without it, is considered in this work. Experimental data from a large (9'' x 9'') NaI(Tl) well type detector, large sample masses (up to 1 kg), and long counting times (up to 10 d) were taken into account in evaluating the minimum measurable radon emanation coefficient. Although less sensitive as compared to methods based on activity measurement of separated radon, this method appears to be almost free of systematic errors. (author)