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Mostrando ítems 51-60 de 93
Artículo
Determination of U isotopic ratios in environmental samples by ICP-MS
(2000)
Inductively coupled plasma mass spectrometry (ICP-MS) has been used for the determination of trace elements in a variety of materials. For uranium, the concentration of 238U can be measured with a detection limit of ...
Artículo
Natural radionuclides (NORM) in a Moroccan river affected by former conventional metal mining activities
(Elsevier, 2019)
The main aim of this work was to determine the levels of multiple natural radionuclides in an aquatic system (Moulouya river, Morocco) impacted by multiple abandoned Zinc and Lead mines. 238U, 234U, 232Th, 230Th and 210Po ...
Ponencia
Occupational exposures and distribution of natural radionuclides in phosphoric acid production by the wet process (Spain)
(2005-10)
The industries devoted to the production of phosphoric acid use as a raw material large amount of phosphate rock (PR), which– depending on its geological origin –could be enriched in natural ...
Artículo
234Th-derived particle fluxes and seasonal variability: when is the ss assumption reliable? Insights from a novel Approach for carbon flux simulation
(AGU Publications, 2018-12)
Th measurements are widely used to estimate the downward carbon flux of particles via the oceanic Biological Pump. Carbon export is evaluated from 234Th-238U disequilibrium assuming either steady state (SS) conditions, or ...
Artículo
Artículo
A revision of energy and resolution calibration method of Ge detectors
(Elsevier, 2006)
The energy and resolution calibration of germanium detectors being basic procedures in gamma-ray spectrometry have not been usually studied in depth. In this paper a new approach to these calibration methods based on the ...
Ponencia
Mecanismos de transferencia de radionucleidos en el medio ambiente
(Empresa Nacional de Residuos Radioactivos, ENRESA, 2004)
Artículo
A review of the production cycle of titanium dioxide pigment
(2014-05)
Titanium is a very important element for several industrial applications, being one of the ninth most abundant elements in the Earth’s crust (0.63% wt). In this work it will discuss the different ...
Ponencia
Factors influencing the distribution of weapon-test plutonium alpha-emitters on the whole-basin of a lake
(2016-11)
By analysing the 239+240Pu and 238Pu content in a total of 32 sediment gravity cores, it has been possible to obtain quite rich information about the accumulation pattern of these radioactive pollutants on the basin of a ...
Artículo
Application of the alpha spectrometry for the study of core sediment extracted in the San Marcos dam in Chihuahua
(Sociedad Mexicana de Física, 2012)
The determination of the specific activities of210Po and isotopic uranium by alpha spectrometry was performed in a sediment core from SanMarcos Dam.The objective of this work was to analyze the vertical distribution of ...