نتایج جستجو برای: lead isotopes
تعداد نتایج: 362795 فیلتر نتایج به سال:
A. I. Morales,1,2,* G. Benzoni,1 A. Gottardo,3,4 J. J. Valiente-Dobón,3 N. Blasi,1 A. Bracco,1,2 F. Camera,1,2 F. C. L. Crespi,1,2 A. Corsi,1,2 S. Leoni,1,2 B. Million,1 R. Nicolini,1,2 O. Wieland,1 A. Gadea,5 S. Lunardi,4,6 M. Górska,7 P. H. Regan,8,9 Zs. Podolyák,8 M. Pfützner,10 S. Pietri,7 P. Boutachkov,7 H. Weick,7 J. Grebosz,11 A. M. Bruce,12 J. Alcántara Núñez,13 A. Algora,5,14 N. Al-Dah...
Investigations into Pb isotope signatures in groundwater and sediments in a uranium‐mineralized area
Manuscript ID: 20160100. Received in: 08/16/2016. Approved in: 01/31/2017. ABSTRACT: This work presents the investigation in an environment that contains uranium deposits by using Pb isotope signatures. The study area, southeast of Brazil, is characterized by the lack of surface water and, as a consequence, the groundwater plays an important role in the econo‐ my of the region, such as the supp...
Findings of coesite and microdiamond in metamorphic rocks of supracrustal protolith led to the recognition of continental subduction to mantle depths. The crust-mantle interaction is expected to take place during subduction of the continental crust beneath the subcontinental lithospheric mantle wedge. This is recorded by postcollisional mafic igneous rocks in the Dabie-Sulu orogenic belt and it...
1987 1. Evidence for Prolate Deformation in Highly Excited Neutron-Deficient Pb Isotopes D. R. Chakrabarty, M. Thoennessen, N. Alamanos, P. Paul, and S. Sen, Phys. Rev. Lett. 58, 1092 (1987) 2. Giant Resonances in Excited Sn Isotopes D. R. Chakrabarty, S. Sen, M. Thoennessen, N. Alamanos, P. Paul, R. Schicker, J. Stachel, and J. J. Gaardhoje, Phys. Rev. C 36, 1886 (1987) 3. Giant Dipole Resonan...
Concentrations and stable isotope ratios of lead (Pb) from lake sediments were used to quantify temporal patterns of anthropogenic Pb pollution in the Clyde River region of Baffin Island, Arctic Canada. Surface sediments from eight lakes on eastern Baffin Island and one from northern-most Greenland, spanning a gradient of 20 degrees latitude, showed great variability with respect to Pb concentr...
Measurement of radon in water by g-ray spectrometry using a HPGe detector has been investigated to determine aquifer characteristics. The radon activity concentration is determined by taking the weighted average of the concentrations derived from g-ray lines associated with Pb and Bi decay. The role of accurate radon data to representatively sample aquifers was also investigated by studying a s...
Due to low cross-sections for the production of heaviest nuclei the choice of the optimum reaction for specific nuclides is crucial for nuclear structure investigations based on α-γ-decay spectroscopy, which demand maximum numbers of observed events. Following previous decay studies of No [1] and Rf [2] an experiment to investigate Sg, the next heavier N=153 isotone, for which only rough decay ...
The main sources of uncertainty encountered during the analysis of the mass concentration of metals in ambient air as part of the operation of the UK Heavy Metals Monitoring Network are presented. It is observed that the uncertainty contribution from possible variation in the isotopic composition of the sample depends on the element in question, but can be significant (e.g., for Pb, Cd, and Hg)...
We have performed shell-model calculations for the N = 126 isotones 210Po, 211At, and 212Rn using a realistic effective interaction derived from the Bonn A nucleon-nucleon potential by means of a G-matrix folded-diagram method. The calculated binding energies, energy spectra and electromagnetic properties show remarkably good agreement with the experimental data. The results of this paper compl...
We have performed shell-model calculations for the N = 126 isotones 210Po, 211At, and 212Rn using a realistic effective interaction derived from the Bonn A nucleon-nucleon potential by means of a G-matrix folded-diagram method. The calculated binding energies, energy spectra and electromagnetic properties show remarkably good agreement with the experimental data. The results of this paper compl...
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