Investigating chromium cycling in global oxygen deficient zones with chromium isotopes [PDF]
, 2021 Chromium (Cr) isotopes have shown great potential as a paleo-redox proxy to trace the redox conditions of ancient oceans and atmosphere. However, its cycling in modern environments is poorly constrained. In my thesis, I attempt to fill in the gap of our understanding of chromium cycling in the modern ocean, with a focus on the redox processes in global
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Discovery of chromium, manganese, nickel, and copper isotopes [PDF]
Atomic Data and Nuclear Data Tables, 2012 Twenty-seven chromium, twenty-five manganese, thirty-one nickel and twenty-six copper isotopes have so far been observed and the discovery of these isotopes is discussed. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.
Garofali, K. +2 more
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The oxic degradation of sedimentary organic matter 1400 Ma constrains atmospheric oxygen levels [PDF]
Biogeosciences, 2017 We studied sediments from the ca. 1400 million-year-old Xiamaling Formation from the North China block. The upper unit of this formation (unit 1) deposited mostly below storm wave base and contains alternating black and green-gray shales with very ...
S. Zhang +6 more
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NEUTRON-RICH CHROMIUM ISOTOPE ANOMALIES IN SUPERNOVA NANOPARTICLES [PDF]
The Astrophysical Journal, 2010 Neutron-rich isotopes with masses near that of iron are produced in type Ia and II supernovae. Traces of such nucleosynthesis are found in primitive meteorites in the form of variations in the isotopic abundance of 54Cr, the most neutron-rich stable isotope of chromium. The hosts of these isotopic anomalies must be presolar grains that condensed in the
Dauphas, N. +8 more
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A new type of solar-system material recovered from Ordovician marine limestone
Nature Communications, 2016 Meteorites falling on Earth today are believed to represent 100–150 parent bodies. Within 470 Myr ago sediments at a limestone quarry in Sweden, Schmitz et al.
B. Schmitz +5 more
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The marine biogeochemistry of chromium isotopes [PDF]
, 2018 In the ocean, chromium (Cr) is a redox-sensitive trace metal. The reduction of Cr(VI) to Cr(III) occurs in oxygen deficient zones (ODZs), and Cr reduction in general has been identified as a significant Cr isotope fractionation mechanism. This thesis presents the first Cr isotope variations (653 Cr) in ODZs of the ocean and adds to the sparse Cr ...
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Environmental Health and Preventive Medicine, 2023 Background: Few prospective studies have investigated the association between paternal occupational exposures and risk of infant congenital heart defects (CHDs).
Mina Hayama-Terada +6 more
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Investigating nuclear deformation and longitudinal form factors in some fp-shell nuclei using the shell model and Hartree - Fock approximation [PDF]
Ядерна фізика та енергетикаThe current study examined the nuclear deformation of certain Titanium and Chromium isotopes using the shell model and Hartree - Fock approximation within the fp-shell model space.
A. A. Alzubadi, R. T. Mahdi
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Provision of optimum requirements for preparation of thin free targets from isotopes of chromium, scandium, zirconium, iron, copper [PDF]
Ядерна фізика та енергетика, 2008 Free films (targets) from high-melting chromium, scandium, zirconium, iron, copper isotopes of textured structures are prepared and explored by the method of thermal sputtering. About 2 sm2 films of ≤ 0,5 mg/sm2 thickness with homogeneity about 1 % and
Yu. V. Kibkalo, V. P. Tokarev
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Measurement of (n,α) cross section for set of structural material isotopes
EPJ Web of Conferences, 2017 A novel spectrometer was developed and used to measure the cross section for the (n,α) reaction at IPPE. Direct measurements of the α-particles yield from solid isotopic pure targets of 50, 52 and 53 chromium, 54 and 57 iron, 60 nickel, and 64 zinc were ...
Khryachkov Vitaly +5 more
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