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San Carlos de Bariloche, Argentina

Milanese M.,National University of Central Buenos Aires | Milanese M.,CONICET | Niedbalski J.,CONICET | Moroso R.,National University of Central Buenos Aires | And 6 more authors.
Review of Scientific Instruments

In this paper, we present preliminary results on the feasibility of employing a low energy (2 kJ, 31 kV) plasma focus device as a portable source of pulsed neutron beams (2.45 MeV) generated by nuclear fusion reactions D-D, for the "in situ" analysis of substances by nuclear activation. This source has the relevant advantage of being pulsed at requirement, transportable, not permanently radioactive, without radioactive waste, cheap, among others. We prove the feasibility of using this source showing several spectra of the characteristic emission line for manganese, gold, lead, and silver. © 2013 AIP Publishing LLC. Source

Gonzalez M.A.,SEGEMAR IGRM DGAA Direccion de Geologia Ambiental y Aplicada | Fracchia D.,CNEA Comision Nacional de Energia Atomica | Solis N.G.,Idgym Institute Geologia Y Mineria Of Jujuy | Barber E.,SEGEMAR Delegacion Jujuy
Revista de la Asociacion Geologica Argentina

The January 12th 2010 mudflow in the Comedero stream, Termas de Reyes, province of Jujuy, affected a hot springs recreational area causing 87 wounded people and severe material damage. This mass movement was triggered by sudden rainfall in the high sectors of the creek in Comedero stream. The resulting deposit was made up by approximately 70 % gravel, 20 % sand and 10 % lime-clay, and included transported wood trunks and blocks of more than 1 m3. According to the plasticity of this material, the flow was classified as a mudflow. The velocity of the flow was calculated through an empirical method, the result of which is coincident with other obtained for events in nearby places in the region. The volume of the flow was directly measured in the field and then calculated with equations previously used for the study of similar flows. According to the stratigraphical and historical record of several previous events in the place, we consider the Comedero creek has a very high probability of being affected by debris flows. According to the consequences upon the Reyes river the studied mudflow is enclosed in the class with potentiality to partially destroy towns and road and bridge infrastructure, and to produce creek damming. The velocity, volume and frequency data calculated in this work, which is part of SEGEMAR's Carta de Peligrosidad Geológica de Salta, are essential items for geologic hazards mapping, infrastructures design, and territorial planning. Source

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