Two new MAX compounds, (Cr2/3Ti1/3)3AlC2 and (Cr5/8Ti3/8)4AlC3, were successfully synthesized by hot‐pressing elemental powders at 1500°C for 1 h under 30 MPa in a flowing argon atmosphere. Their ...crystal structures were indentified and characterized by X‐ray diffraction and transmission electron microscopy analysis. (Cr2/3Ti1/3)3AlC2 and (Cr5/8Ti3/8)4AlC3 have the same crystal structures with the well‐characterized Ti3AlC2 and Ti4AlN3, respectively.
Correction for 'Solvation of Li
+
by argon: how important are three-body forces?' by Frederico V. Prudente
et al.
,
Phys. Chem. Chem. Phys.
, 2017,
19
, 25707-25716.
The hydriding/dehydriding characteristics of 90 wt% MgH2a10 wt% MeSi2 (Me = Ti, Cr) composites, synthesized by ball milling under argon, were studied by Sievertas type apparatus and by high-pressure ...differential scanning calorimetry (HPDSC). The composites have demonstrated similar absorption kinetics and capacity at temperature of 300 degree C and a pressure of 1 MPa. They showed fast kinetics and achieved absorption capacity higher than 6 wt%. Slightly higher values for the enthalpy of hydriding and dehydriding were obtained at scanning conditions in the HPDSC for the composite 90 wt% MgH2a10 wt% CrSi2 compared to those for the composite with addition of TiSi2.
In a microwave argon plasma, the electron-impact population transfers between the first four excited states of argon are studied by time-resolved laser pump-probe technique. Metastable atoms in the ...1s sub(5) state (in Paschen's notation) are selectively pumped up to the 2p sub(3) state, with a nanosecond pulsed dye laser tuned to the 706 nm argon transition and the temporal response of the densities in the 1S sub(3), 1S sub(4) and 1S sub(5) states are monitored by time-resolved laser diode absorption. The electron density and temperature are also measured by Thomson scattering along the plasma column for different pressures. The rate coefficient measured for the 1s sub(3) to 1S sub(2) state transfer, for which only rough estimations exist in the literature is found to be 9 x 10 super(-13) m super(3) s super(-1), almost five times larger than the value commonly assumed.
Li sub(0.33)La sub(0.55)TiO sub(3) solid electrolytes with a pure phase were synthesized by the citric acid-supported sol-gel method and then sintered under controlled redox atmospheres of air, argon ...and hydrogen. Although of similar morphology and relative density, Li sub(0.33)La sub(0.55)TiO sub(3) samples sintered under reduction atmosphere such as argon and hydrogen exhibited a tetragonal structure with lattice distortion. The distortion and volume expansion of the crystal lattice was identified as originating from the transformation of the Ti valence state, and this was more clearly observed under sintering of the hydrogen atmosphere. The qualitative analysis of the Ti valence state using an X-ray Photoelectron Spectroscopy experiment was performed and indicated that the largest amount of Ti super(3+)(18.6%) was formed in the Li sub(0.33)La sub(0.55)TiO sub(3) samples sintered under hydrogen atmosphere. The relationship between the lattice distortion and the lithium ion conductivity of the Li sub(0.33)La sub(0.55)TiO sub(3) sintered under different atmospheres is also discussed on the basis of the lattice distortion.
A new compound Er sub(3)Co sub(4)Al sub(12 ) was prepared by arc melting under argon atmosphere. The powder X-ray diffraction data of Er sub(3)Co sub(4)Al sub(12 ) were successfully indexed, giving a ...hexagonal structure with a = 8.6185(2) Aa, c = 9.2347(3) Aa, and unit-cell volume V = 594.04 Aa super(3). Compound Er sub(3)Co sub(4)Al sub(12 ) has the Gd sub(3)Ru sub(4)Al sub(12 ) type-structure, Z = 2 and space group P6 sub(3)/mmc.
CaTS: Integration of Geant4 and Opticks Wenzel, Hans; Yung Jun, Soon; Genser, Krzysztof ...
EPJ Web of Conferences,
2024, Letnik:
295
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
CaTS 6is an advanced example that is part of Geant4 since version 11.0. It demonstrates the use of Opticks to offload the simulation of optical photons to GPUs. Opticks interfaces with the Geant4 ...toolkit to collect all the necessary information to generate and trace optical photons, re-implements the optical physics processes to be run on the GPU, and automatically translates the Geant4 geometry into a GPU appropriate format. To trace the photons, Opticks uses NVIDIA OptiX®. In this report, we describe CaTS and the integration of Opticks with Geant4. We demonstrate that the generation and tracing of optical photons represents an ideal application to be offloaded to GPUs, fully utilizing the high degree of available parallelism. In a typical liquid argon TPC simulation, a speedup of several hundred times is observed compared to an equivalent simulation using single threaded Geant4.
PDF
