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Mostrando ítems 201-210 de 223
Artículo
Protrusion formation and surface porosity development on thermally annealed helium implanted copper
(ScienceDirect, 2004-04)
Surface effects on (1 1 1) copper single crystal surfaces after 30 keV helium implantation up to 2.4 × 1016 ions cm−2 and subsequent annealing at 973 K have been studied using scanning electron and confocal microscopy. ...
Artículo
Oxidation post-treatment of hard AlTiN coating for machining of hardened steels
(ScienceDirect, 2009-10-25)
In this study, cemented carbide ball nose end mills with nano-crystalline Al0.67Ti0.33N hard PVD coatings deposited by cathodic arc evaporation were annealed at 700 °C during 2 h in a controlled atmosphere environment ...
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
Transfer of Cd, Pb, Ra and U from Phosphogypsum Amended Soils to Tomato Plants
(Springer, 2009)
About 170 million tons of phosphogypsum (PG) are annually generated worldwide as a by-product of phosphoric acid factories. Agricultural uses of PG could become the main sink for this waste, which usually contains significant ...
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
The use of 99mTc as a tracer in the determination of 99Tc by ICPmass spectrometry
(2000)
The aim of this paper is to carry out a deep study on the possibilities of using 99mTc from 99Mo-99mTc clinical isotope generators to trace the radiochemical separations for 99Tc measurements by ICP-MS. By appropriately de®ning ...
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
The cumulative effect of three decades of phosphogypsum amendments in reclaimed marsh soils from SW Spain: 226Ra, 238U and Cd contents in soils and tomato fruit
(Elsevier, 2008)
Phosphogypsum (PG), a by-product of the phosphate fertiliser industries, has been applied as soil amendment to reduce Na saturation in soils, as in the reclaimed marsh area from SW Spain, where available PG has a typical ...
Artículo
Comment on “Breakup length of forced liquid jets”
(AIP Publishing, 2006-01-12)
Artículo
External radiation assessment in a wet phosphoric acid production plant
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
The factories dedicated to the production of phosphoric acid by the so-called wet acid method are usually considered typical NORM industries, because the phosphate rock used as raw material usually contains high concentrations ...