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View article: Towards the Giant Radio Array for Neutrino Detection (GRAND): the GRANDProto300 and GRAND@Auger prototypes
Towards the Giant Radio Array for Neutrino Detection (GRAND): the GRANDProto300 and GRAND@Auger prototypes Open
The Giant Radio Array for Neutrino Detection (GRAND) is a proposed multi-messenger observatory of ultra-high-energy (UHE) particles of cosmic origin. Its main goal is to find the long-sought origin of UHE cosmic rays by detecting large num…
View article: A radiometric timescale challenges the chronology of the iconic 1992 Guliya ice core
A radiometric timescale challenges the chronology of the iconic 1992 Guliya ice core Open
The Guliya (Tibet) ice core drilled in 1992 (GP1992) has garnered special interest because of its exceptionally long timescale of ~760 thousand years. This timescale makes GP1992 currently the second oldest ice core in the world, much olde…
View article: Identification of 320 000-year-old blue ice at the surface of the Elephant Moraine region, East Antarctica
Identification of 320 000-year-old blue ice at the surface of the Elephant Moraine region, East Antarctica Open
To address important paleoclimatic questions, such as the cause of the Mid-Pleistocene Transition (MPT), the search for 1-million-year-old ice is of great interest. Antarctic blue-ice areas (BIAs), where ancient ice outcrops on the surface…
View article: Reproducibility of Radiokrypton in Deep Desert Aquifers: Insights from a Decade of Research
Reproducibility of Radiokrypton in Deep Desert Aquifers: Insights from a Decade of Research Open
Great technical advances have been achieved since the first atom-trap trace analysis (ATTA) -based radiokrypton application in Egypt, where 1 Myr old groundwater was discovered. Beyond advances in ATTA measurement capabilities, including r…
View article: Observation of a Spectral Hardening in Cosmic Ray Boron Spectrum with the DAMPE Space Mission
Observation of a Spectral Hardening in Cosmic Ray Boron Spectrum with the DAMPE Space Mission Open
Secondary cosmic ray fluxes are important probes of the propagation and interaction of high-energy particles in the Galaxy. Recent measurements of primary and secondary cosmic ray nuclei have revealed unexpected spectral features that dema…
View article: 81Kr dating of 1 kg Antarctic ice
81Kr dating of 1 kg Antarctic ice Open
Recovering earth's climate history from ice cores requires reliable dating of the ice. 81Kr is ideal for radiometric dating up to more than one million years, but the isotope is so rare that it has long been a challenge to apply 81Kr datin…
Electrochemical‐Thermochemical Cascade System for the Sustainable Conversion of Crude Acetylene to C<sub>6+</sub> Esters Open
Acetylene (C 2 H 2 ), a critical chemical feedstock derived from natural gas or coal, faces sustainability challenges due to high CO₂ emissions from conventional production methods. These emissions not only contribute to carbon footprints …
View article: A 350,000-year-old blue ice identified at the surface of the Elephant Moraine region, East Antarctica
A 350,000-year-old blue ice identified at the surface of the Elephant Moraine region, East Antarctica Open
For addressing important paleoclimatic questions, such as the cause of the Mid-Pleistocene Transition (MPT), the search for one-million-year-old ice is of great interest. Antarctic blue-ice areas (BIAs), where ancient ice outcrops on the s…
View article: Dating of groundwater with 85Kr, 39Ar and 81Kr
Dating of groundwater with 85Kr, 39Ar and 81Kr Open
85Kr (t1/2=10.7 a), 39Ar (t1/2=268 a) and 81Kr (t1/2=229 ka) are valuable isotopes for radiometric dating of groundwater, especially due to their gaseous properties and chemical inertness. Together with 14C, these radioisotopes cover the a…
View article: 81Kr dating of 1 kg polar ice
81Kr dating of 1 kg polar ice Open
81Kr (t1/2=229 ka) is a valuable isotope for radiometric dating of water and ice with a dating range from thirty thousand to over one million years. It is produced by cosmic rays in the stratosphere, and uniformly distributed in the atmosp…
41Ca dating of marine deposits from Middle and Late Pleistocene Open
41Ca (half-life = 99 ka) is a cosmogenic radionuclide that has long been proposed as a promising dating tracer for geological and archaeological samples from Middle and Late Pleistocene [1]. Calcium is abundant and has a residence time of …
View article: Ice half a million years old at the base of the Skytrain Ice Rise ice core
Ice half a million years old at the base of the Skytrain Ice Rise ice core Open
Skytrain Ice Rise is a separate ice flow centre at the inland edge of the Ronne Ice Shelf, on the periphery of the West Antarctic Ice Sheet. An ice core drilled through to the base of the ice at 651 m was dated as far as 126 ka before pres…
View article: Gas extraction from continuous flow analysis for dating ice cores with 39Ar and 81Kr
Gas extraction from continuous flow analysis for dating ice cores with 39Ar and 81Kr Open
Paleoclimate reconstructions from ice core records can be hampered due to the lack of a reliable chronology, especially in deep ice, when the stratigraphy is disturbed and conventional dating methods cannot be applied. The noble gas radioi…
View article: The Calibrations of the DAMPE γ-Ray Effective Area
The Calibrations of the DAMPE γ-Ray Effective Area Open
The Dark Matter Particle Explorer (DAMPE) is a cosmic-ray detector as well as a pair-converting γ -ray telescope. The effective area, reflecting the geometrical cross-section area, the γ -ray conversion probability, and the photon selectio…
PSF Calibration of DAMPE for gamma-ray Observations Open
The DArk Matter Particle Explorer (DAMPE) is dedicated to exploring critical scientific domains including the indirect detection of dark matter, cosmic ray physics, and gamma ray astronomy. This study introduces a novel method for calibrat…
Feasibility of 129I groundwater dating calibrated by both 81Kr and 4He for the assessment of deep geological repositories in Japan Open
Iodine-129, which is a promising tracer for dating old groundwater, has been used as a tracer for deep upwelling groundwater. The nuclide is expected to be one of the key factors for site selection for high-level radioactive waste disposal…
View article: Brief communication: Identification of 140 000-year-old blue ice in the Grove Mountains, East Antarctica, by krypton-81 dating
Brief communication: Identification of 140 000-year-old blue ice in the Grove Mountains, East Antarctica, by krypton-81 dating Open
The presence of exceptionally old ice and relative ease of access make Antarctic blue-ice areas (BIAs) attractive paleoclimate archives. However, only a handful of BIAs, mostly situated in West Antarctica and along the Transantarctic Mount…
View article: Tailoring Na<sup>+</sup> Solvation Environment and Electrode‐Electrolyte Interphases with Sn(OTf)<sub>2</sub> Additive in Non‐flammable Phosphate Electrolytes towards Safe and Efficient Na‐S Batteries
Tailoring Na<sup>+</sup> Solvation Environment and Electrode‐Electrolyte Interphases with Sn(OTf)<sub>2</sub> Additive in Non‐flammable Phosphate Electrolytes towards Safe and Efficient Na‐S Batteries Open
Room‐temperature sodium‐sulfur (RT Na‐S) batteries are promising for low‐cost and large‐scale energy storage applications. However, these batteries are plagued by safety concerns due to the highly flammable nature of conventional electroly…
Investigating the enigma of an irregular groundwater age pattern in a confined, presumed “fossil” complex aquifer through mixing cell flow modeling Open
Significant fluctuations in the groundwater (GW) age along the eastern flow path of the Nubian Sandstone Aquifer's (NSA), as derived from Krypton-81 groundwater dating, have suggested that this aquifer, located in Israel's Negev Desert and…
View article: Brief communication: Identification of 140,000-year-old blue ice in Grove Mountains, East Antarctica, by krypton-81 dating
Brief communication: Identification of 140,000-year-old blue ice in Grove Mountains, East Antarctica, by krypton-81 dating Open
The presence of exceptionally old ice and the relative ease of access make Antarctic blue ice areas (BIAs) attractive paleoclimate archives. However, only a handful of BIAs, mostly situated in West Antarctica and along the Trans-Antarctic …
Provenance of Volcanogenic Deposits from the Shanxi Formation of the Daniudi Gas Field, Ordos Basin, and Its Tectonic Implications Open
Through detailed drill-core description, petrography, cathodoluminescence imaging, and geochemistry analysis, sedimentary deposits with a high content of volcanogenic components (27.6%) were discovered in the Shanxi Formation of the Daniud…
View article: The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core Open
The EPICA (European Project for Ice Coring in Antarctica) Dome C (EDC) ice core drilling in East Antarctica reaches a depth of 3260 m. The reference EDC chronology, the AICC2012 (Antarctic Ice Core Chronology 2012), provides an age vs. dep…
View article: Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force
Multi-alpha Boson Gas state in Fusion Evaporation Reaction and Three-body Force Open
The experimental evidence for the $α$ Boson gas state in the $^{11}$C+$^{12}$C$\rightarrow$$^{23}$Mg$^{\ast}$ fusion evaporation reaction is presented. By measuring the $α$ emission spectrum with multiplicity 2 and 3, we provide insight in…