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Mostrando ítems 201-210 de 222
Artículo
A semi-empirical approach for determination of low-energy gamma-emmiters in sediment samples with coaxial Ge-detectors
(Elsevier, 2004)
A simple method for the determination in sediment samples of low-energy gamma-emitters with coaxial Ge detectors and using a cylindrical sample geometry is outlined. This method allows an easy estimation of self-absorption ...
Artículo
Geometry-assisted topological transitions in spin interferometry
(American Physical Society, 2019)
We identify a series of topological transitions occurring in electronic spin transport when manipulating spin-guiding fields controlled by the geometric shape of mesoscopic interferometers. They manifest as distinct ...
Artículo
Thermodynamical cost of some interpretations of quantum theory
(PRA, 2016)
The interpretation of quantum theory is one of the longest-standing debates in physics. Type I interpretations see quantum probabilities as determined by intrinsic properties of the observed system. Type II see them as ...
Artículo
Design of Broadband Aperture-Coupled Stacked Microstrip Antennas Using Second-Order Filter Theory
(IEEE, 2022-07)
In this article, the authors propose a lumped circuit methodology for the design of broadband stacked microstrip patch antennas fed through an aperture. First, an equivalent circuit (EC) is introduced for the antenna. The ...
Artículo
A dosimetric model for determining the effectiveness of soil covers for phosphogypsum waste piles
(Lippincott, 2001)
Phosphogypsum (PG) is a by-product of the phosphoric acid production process that contains high concentrations of U-series radionuclides. PG piles formed during the last 30 years cover about 1,200 hectares and are located ...
Artículo
A short-time method to measure the radon potential of porous materials
(Elsevier, 2009)
The radiological risk associated with the use of solid materials has been traditionally established according to their radon exhalation rates, the accumulation chamber technique being the most widely used for the ...
Artículo
A comparison of 210Pbxs, 137Cs, and Pu isotopes as proxies of soil redistribution in South Spain under severe erosion conditions
(Springer, 2023-06-01)
Purpose The use of fallout radionuclides as proxies for the study of soil redistribution processes in semiarid environments of Southern Spain has been restricted to 137Cs. The potential and limitations of alternative ...
Artículo
Radioactive impact in sediments from an estuarine system affected by industrial wastes releases
(Elsevier, 2002)
A big fertilizer industrial complex and a vast extension of phosphogypsum piles (12 km2), sited in the estuary formed by the Odiel and Tinto river mouths (southwest of Spain), are producing an unambiguous radioactive ...
Artículo
A simple method for efficiency calibration of HPGe detectors in gamma-spectrometric measurements
(Elsevier, 2001)
In this paper a simple, rapid and general method for g-ray efficiency calibration of Ge detectors for environmental samples is presented. This method is based on the use of an active natural solid sample with several ...
Artículo
Exploring cellulose triacetate nanofibers as sustainable structuring agent for castor oil: formulation design and rheological insights
(MDPI, 2024-03-25)
Developing gelled environmentally friendly dispersions in oil media is a hot topic for many applications. This study aimed to investigate the production of electrospun cellulose triacetate (CTA) nanofibers and to explore ...