Towards molecular laser separation of uranium isotopes

2021 ◽  
Author(s):  
Grigorii N. Makarov
Keyword(s):  
Uranium Isotopes ◽  
Molecular Laser ◽  
Laser Separation

scholarly journals New α -Emitting Isotope U214 and Abnormal Enhancement of α -Particle Clustering in Lightest Uranium Isotopes

2021 ◽  
Vol 126 (15) ◽  
Author(s):  
Z. Y. Zhang ◽  
H. B. Yang ◽  
M. H. Huang ◽  
Z. G. Gan ◽  
C. X. Yuan ◽  
...  
Keyword(s):  
Uranium Isotopes ◽  
Particle Clustering

scholarly journals Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Matthew O. Clarkson ◽  
Timothy M. Lenton ◽  
Morten B. Andersen ◽  
Marie-Laure Bagard ◽  
Alexander J. Dickson ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Global Scale ◽  
Uranium Isotopes ◽  
Biogeochemical Model ◽  
Emission Scenarios ◽  
Isotope Data ◽  
Upper Limit ◽  
Thermal Maximum ◽  
Upper Limits ◽  
Anoxic Events

AbstractThe Paleocene Eocene Thermal Maximum (PETM) represents a major carbon cycle and climate perturbation that was associated with ocean de-oxygenation, in a qualitatively similar manner to the more extensive Mesozoic Oceanic Anoxic Events. Although indicators of ocean de-oxygenation are common for the PETM, and linked to biotic turnover, the global extent and temporal progression of de-oxygenation is poorly constrained. Here we present carbonate associated uranium isotope data for the PETM. A lack of resolvable perturbation to the U-cycle during the event suggests a limited expansion of seafloor anoxia on a global scale. We use this result, in conjunction with a biogeochemical model, to set an upper limit on the extent of global seafloor de-oxygenation. The model suggests that the new U isotope data, whilst also being consistent with plausible carbon emission scenarios and observations of carbon cycle recovery, permit a maximum ~10-fold expansion of anoxia, covering <2% of seafloor area.

Rapid mineral surface weathering beneath the Greenland Ice Sheet shown by radium and uranium isotopes

2020 ◽  
Vol 547 ◽  
pp. 119663
Author(s):  
Benjamin S. Linhoff ◽  
Mathew A. Charette ◽  
Jemma Wadham
Keyword(s):  
Ice Sheet ◽  
Greenland Ice Sheet ◽  
Uranium Isotopes ◽  
Mineral Surface

Molecular laser stabilization at low frequencies for the LISA mission

2010 ◽  
Vol 81 (8) ◽  
Author(s):  
B. Argence ◽  
H. Halloin ◽  
O. Jeannin ◽  
P. Prat ◽  
O. Turazza ◽  
...  
Keyword(s):  
Laser Stabilization ◽  
Low Frequencies ◽  
Molecular Laser
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