Positron annihilation spectroscopy using lifetime and Doppler broadening allows the characterization of lithiation state in LiCoO2 thin film used cathode lithium-ion batteries. The results reflect positron spillover because presence graphite between oxide grains real Li-ion This produces an effect measured parameters which are sensitive to delocalized electrons from lithium atoms as Compton sca...

We report a positron annihilation study using state-of-the-art experimental and theoretical methods in n-type semi-insulating β-Ga2O3. utilize the recently discovered unusually strong Doppler broadening signal anisotropy of β-Ga2O3 orientation-dependent measurements, complemented by temperature-dependent lifetime experiments first principles calculations positron–electron signals. find that spl...

first approximation. The resonant scattered gamma-ray distribution is shown in Fig. 2 for a source strength of 20 millicuries. The ratio of the 837-kev to 961-kev photopeaks is 1.8 which is in agreement with the ratio of the p rays before scattering, 1.4, corrected for detection e%ciencies and for the different angular distributions of the scattered gamma rays at 100'—the mean angle of scatteri...

Temperature detection remains challenging in the low stratosphere, where the Rayleigh integration lidar is perturbed by aerosol contamination and ozone absorption while the rotational Raman lidar is suffered from its low scattering cross section. To correct the impacts of temperature on the Rayleigh Doppler lidar, a high spectral resolution lidar (HSRL) based on cavity scanning Fabry-Perot Inte...

[1] Several aspects of spectral broadening and drizzle growth in shallow liquid clouds remain not well understood. Detailed, cloud‐scale observations of microphysics and dynamics are essential to guide and evaluate corresponding modeling efforts. Profiling, millimeter‐wavelength (cloud) radars can provide such observations. In particular, the first three moments of the recorded cloud radar Dopp...

Recently, Narayan & Raymond (1999) proposed that the thermal emission lines from the hot plasma in advection dominated accretion flows (ADAFs) are potentially observable with the next generation of X-ray observatories, with which the physical properties of some X-ray sources can be probed. In ADAFs, the temperature of the ion is so high that the thermal broadening of the line is important. We c...

In a recent paper [Gorshkov et al., Phys. Rev. Lett. 98, 123601 (2007)] and in the two preceding papers [Gorshkov et al., Phys. Rev. A 76, 033804 (2007); 76, 033805 (2007)], we used a universal physical picture to optimize and demonstrate equivalence between a wide range of techniques for storage and retrieval of photon wave packets in homogeneously broadened Λ-type atomic media, including the ...

The Earth Clouds, Aerosol, and Radiation Explorer (EarthCARE) is a satellite mission jointly developed by the Japan Aerospace Exploration Agency (JAXA) European Space (ESA). One challenging feature of this observation Doppler velocity Cloud Profiling Radar (EC-CPR). measurement accuracy affected random errors induced broadening due to finite beamwidth folding caused pulse repetition frequency. ...