Relevant bibliographies by topics / Platinum stable isotopes

Academic literature on the topic 'Platinum stable isotopes'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Platinum stable isotopes"

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Neu, W., G. Passler, G. Sawatzky, R. Winkler, and H. J. Kluge. "Isotope shift and hyperfine structure of stable platinum isotopes." Zeitschrift f�r Physik D Atoms, Molecules and Clusters 7, no. 2 (June 1987): 193–201. http://dx.doi.org/10.1007/bf01384588.

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Sharma, K. S., J. Vaz, R. C. Barber, F. Buchinger, J. A. Clark, J. E. Crawford, H. Fukutani, et al. "Atomic mass ratios for some stable isotopes of platinum relative to 197Au." European Physical Journal A 25, S1 (August 11, 2005): 45–46. http://dx.doi.org/10.1140/epjad/i2005-06-191-0.

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Crawford, Isobel, Daniel Layton-Matthews, Jan M. Peter, Michael G. Gadd, Alexandre Voinot, Matthew I. Leybourne, and Peir Pufahl. "Application of molybdenum and thallium isotopes as indicators of paleoredox conditions and genesis of hyper-enriched black shale deposits, Peel River, Yukon, Canada." Canadian Mineralogist 59, no. 5 (September 1, 2021): 1085–110. http://dx.doi.org/10.3749/canmin.2000099.

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ABSTRACT Hyper-enriched black shale (HEBS) deposits in northern Yukon, consist of thin (<10 cm), laterally extensive (tens of thousands of km2) stratiform sulfide mineralization layer(s) that are hyper-enriched in Ni, Mo, Zn, platinum group elements, Re, and Au. The genesis of HEBS deposits and the ambient paleoenvironment in which they formed are the subject of vigorous debate. Non-traditional stable isotopes, particularly molybdenum and thallium, are robust paleoredox indicators and we have employed these isotope systems in this study of Yukon HEBS. Systematic sampling and Mo and Tl isotopic analysis of a continuous 200 m stratigraphic section through the Yukon HEBS mineralization and footwall and hanging-wall strata at the Peel River north and south bank showings (spaced five km apart) give δ98Mo –1.24 to –0.53‰ and –8.1 to –5.2 ε-units for the mineralization and –0.70 to 0.60‰ and –6.5 to –2.0 ε-units for the unmineralized strata. These values preclude a hydrothermal origin and strongly suggest that redox processes were responsible for the Yukon HEBS mineralization. The isotopic compositions, together with rare earth element (REE) systematics (REE profile, Y positive anomalies, Ce negative anomalies, and Y/Ho values) and other bulk geochemical redox indicators (Mo, V, Re/Mo, Ni/Co, U/Th, and V/Cr) indicate that the Peel River HEBS mineralization formed because of metal scavenging from seawater in a quiescent, euxinic basinal paleoenvironment.
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A V, Anjana, Nicemon Thomas, and Antony Joseph. "Charge Radius And Neutron Skin Thickness Of Platinum And Osmium Isotopes Near The Nuclear Drip Lines." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no. 2 (June 20, 2022): 187–91. http://dx.doi.org/10.15415/jnp.2022.92027.

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Background: The density distributions of exotic nuclei are different from that of stable nuclei. For stable nuclei, charge radii can be obtained through electron scattering experiments. The excessive neutrons in neutron-rich nuclei make a decoupling of neutron and proton distribution and as a result nuclear skin structures are appeared.Purpose: The charge radius and the way by which nucleons are distributed can provide information about size, surface thickness and shell structure of nuclei. The information collected from such nuclei can be used for astrophysical studies to understand the origin of heavy elements. Methods: In the present study, we have made an attempt to investigate the charge radii, rms radii and skin thickness of Pt and Os isotopes. Here, the calculations were made by using the HFB solver which utilizes HO single-particle basis and iteratively diagonalizes the HFB Hamiltonian based on the Skyrme forces.Results: Here we can observe an increase in charge radius, rms radius and skin thickness with neutron number. The charge radii calculated are in good agreement with the experimental data and predictions of RCHB model. A linear dependence of skin thickness on neutron number is observed with the change in slope is noticed around N =126.Conclusion: Using HFB theory, we have analyzed the charge radius and neutron skin thickness of Pt and Os isotopes. The drip line nuclei have larger charge radius in comparison to the stable nuclei. The redistribution of the nucleons due to addition of neutrons leads to the gradual increase in neutron skin. The sudden increase of skin thickness may be due to the extra stability and shell closure around the magic number.
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Badola, Amit, S. K. Singhal, and Manoj Bhatnagar. "(n, and945) reaction cross-section of stable isotopes of Platinum and Osmium for fusion reactor technology." International Journal of Scientific Research in Physics and Applied Sciences 6, no. 5 (October 31, 2018): 125–33. http://dx.doi.org/10.26438/ijsrpas/v6i5.125133.

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Rivera, Javier, Martin Reich, Ronny Schoenberg, José María González-Jiménez, Fernando Barra, Thomas Aiglsperger, Joaquín A. Proenza, and Sebastien Carretier. "Platinum-group element and gold enrichment in soils monitored by chromium stable isotopes during weathering of ultramafic rocks." Chemical Geology 499 (November 2018): 84–99. http://dx.doi.org/10.1016/j.chemgeo.2018.09.008.

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Seshavatharam, U. V. S., and S. Lakshminarayana. "Energy, Economical, Environmental and Medical Applications of Cold Nuclear Fusion of Hydrogen with Powder and Liquid Forms of Metals." Innovation in Science and Technology 1, no. 3 (October 2022): 43–50. http://dx.doi.org/10.56397/ist.2022.10.04.

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Aim of this paper is to highlight the four major applications of Cold Nuclear fusion (CNF). Considering Google publications, NASA publications, European funding amounts and other important experimental results, we have developed a mechanism for understanding the mystery of energy liberation in CNF associated with fusion of hydrogen with metals. Apart from clean thermal energy liberation, we have identified three important applications of CNF. They are: Preparing Iridium-, Platinum-and Gold-like costly elements from Tungsten-like elements, converting high level nuclear radioactive waste into stable atomic nuclides and preparing radioactive isotopes for medical applications. It may be noted that, we have developed a common, simple and workable theoretical procedure for understanding the above applications and it needs funding for conducting experimental studies. We emphasize the point that, our proposed scientific concept of CNF is practical compared to other theoretical models of cold nuclear fusion.
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Bosley, Keith L., and Sam C. Wainright. "Effects of preservatives and acidification on the stable isotope ratios (15N:14N, 13C:12C) of two species of marine animals." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 11 (November 1, 1999): 2181–85. http://dx.doi.org/10.1139/f99-153.

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When animal tissues are prepared for stable isotope ratio analysis, they may or may not be treated with acid prior to analysis to remove carbonates and are loaded into tin or silver weigh boats for quantitative combustion. The effects of these methodological variations are poorly known. The effects of various preservation methods on isotopic compositions are also poorly known. We tested the effects of four preservation methods, (i) formalin, (ii) formalin followed by a transfer to ethanol (formalin/EtOH), (iii) saturated mercuric chloride solution, and (iv) freezing/freeze-drying, on the carbon and nitrogen isotopic composition of the muscle tissue of juvenile winter flounder (Pleuronectes americanus) and the tails (including exoskeleton) of mud shrimp (Crangon septemspinosa). Freezing and freeze-drying were the only preservation methods that did not affect stable isotope ratios of carbon and nitrogen. Formalin, formalin/EtOH, and saturated mercuric chloride solution produced significant increases in δ15N values (0.5-1.4‰) and decreases in δ13C values (0.6-2.3‰) compared with frozen samples. There was also an increase in the variability of δ15N and (or) δ13C values. We also tested the effects of acidification by comparing samples that were acidified either by fuming with concentrated HCl or by the direct application of 1 N HCl containing 1.0% platinum chloride (a combustion catalyst) to unacidified samples. Neither concentrated HCl fumes nor HCl/platinum chloride had a significant effect on the δ15N or δ13C values of either species compared with unacidified samples. Therefore, acidification may be unnecessary in the preparation of some marine animals. Finally, we compared the effects of two types of sample boats: tin and silver. We found no significant effect of boat material on the δ15N or δ13C values of either species.
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Wallner, A., K. Melber, S. Merchel, U. Ott, O. Forstner, R. Golser, W. Kutschera, A. Priller, and P. Steier. "Stable platinum isotope measurements in presolar nanodiamonds by TEAMS." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 294 (January 2013): 496–502. http://dx.doi.org/10.1016/j.nimb.2012.03.036.

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Creech, John, Joel Baker, Monica Handler, Martin Schiller, and Martin Bizzarro. "Platinum stable isotope ratio measurements by double-spike multiple collector ICPMS." Journal of Analytical Atomic Spectrometry 28, no. 6 (2013): 853. http://dx.doi.org/10.1039/c3ja50022e.

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Dissertations / Theses on the topic "Platinum stable isotopes"

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Barra-Pantoja, Luis Fernando. "A Re-Os Study of Sulfides from the Bagdad Porphyry Cu-Mo Deposit, Northern Arizona, USA." Thesis, The University of Arizona, 2001. http://hdl.handle.net/10150/249252.

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Use of Re-Os systematics in sulfides from the Bagdad porphyry Cu-Mo deposit provide information on the timing of mineralization and the source of the ore -forming elements. Analyzed samples of pyrite, chalcopyrite and molybdenite mainly from the quartz monzonite and porphyritic quartz monzonite units are characterized by a moderate to strong potassic alteration (secondary biotite and K- feldspar). Rhenium concentrations in molybdenite are between 330 and 730 ppm. Two molybdenite samples from the quartz monzonite and porphyritic quartz monzonite provide a Re-Os isotope age of 71.7 ± 0.3 Ma. A third sample from a molybdenite vein in Precambrian rocks yields an age of 75.8 ± 0.4 Ma. These molybdenite ages support previous suggestions of two mineralization episodes in the Bagdad deposit. An early event at 76 Ma and a later episode at 72 Ma. Pyrite Os and Re concentrations range between 0.008-0.016 and 3.9-6.8 ppb, respectively. Chalcopyrite contains a wide range of Os (6 to 91 ppt) and Re (1.7 to 69 ppb) concentrations and variable ¹⁸⁷Os/¹⁸⁸Os ratios that range between 0.13 to 22.27. This variability in the chalcopyrite data may be attributed to different copper sources, one of them the Proterozoic volcanic massive sulfides in the district, or to alteration and remobilization of Re and Os. Analyses from two pyrite samples yield an eight point isochron with an age of 77 ± 15 Ma and an initial ¹⁸⁷Os/¹⁸⁸Os ratio of 2.12. This pyrite Re-Os isochron age is in good agreement with the molybdenite ages. We interpret the highly radiogenic initial 1870s/188Os as an indication that the source of Os and, by inference, the ore-forming elements for the Bagdad deposit, was mainly the crust. This conclusion agrees with previous Pb and Nd isotope studies and supports the notion that a significant part of the metals and magmas have a crustal source.
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Seat, Zoran. "Geology, petrology, mineral and whole-rock chemistry, stable and radiogenic isotope systematics and Ni-Cu-PGE mineralisation of the Nebo-Babel intrusion, West Musgrave, Western Australia." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0202.

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The Nebo-Babel Ni-Cu-platinum-group element (PGE) magmatic sulphide deposit, a world-class ore body, is hosted in low-MgO, tube-like (chonolithic) gabbronorite intrusion in the West Musgrave Block, Western Australia. The Nebo-Babel deposit is the first significant discovery of a nickel sulphide deposit associated with the ca. 1078 Ma Giles Complex, which is part of the Warakurna large igneous province (LIP), now making the Musgrave Block a prime target for nickel sulphide exploration. The Musgrave Block is a Mesoproterozoic, east-west trending, orogenic belt in central Australia consisting of amphibolite and granulite facies basement gneisses with predominantly igneous protoliths. The basement lithologies have been intruded by mafic-ultramafic and felsic rocks; multiply deformed and metamorphosed between 1600 Ma and 500 Ma. The Giles Complex, which is part of the Warakurna LIP, was emplaced at ca. 1078 Ma and consists of a suite of layered mafic-ultramafic intrusions, mafic and felsic dykes and temporally associated volcanic rocks and granites. The Giles Complex intrusions are interpreted to have crystallised at crustal depths between 15km and 30km and are generally undeformed and unmetamorphosed.
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