Crystal structure of tris(5-chloro-2-hydroxybenzoato-κ2O,O’)bis(1,10- phenantroline-κ2N,N’)dysprosium(III), C45H28Cl3DyN4O9
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Low phonon energy fluorozirconate-based glass ceramics for efficient rare-earth luminescence
Fluorozirconate-based, highly transparent glass ceramics doped with Nd3+ exhibit very low multiphonon relaxation rates following an exponential energy gap dependence. The resulting high radiative quantum efficiencies show the material’s potential for amplifier applications.
I. Accurate 50-200 keV proton stopping cross sections in solids II. Lateral growth of Si wires on Si (100) substrate
Medium energy ion scattering (MEIS) is used to determine the elemental depth profile in the first few hundred angstroms of a sample. The interpretation of MEIS spectra requires an accurate knowledge of the rate at which the ions lose their energy - the stopping cross section, ε. The rate of energy loss has been fairly…
The Dilution Dependency of Multigroup Uncertainties
The propagation of nuclear data uncertainties through reactor physics calculation has received attention through the Organization for Economic Cooperation and Development—Nuclear Energy Agency’s Uncertainty Analysis in Modelling (UAM) benchmark. A common strategy for performing lattice physics uncertainty analysis inv…
Si-based Microcavity Devices with Ge Quantum Dots
Site-controlled single Ge quantum dot was grown on patterned silicon-on-insulator substrate. The single dot was then precisely embedded into a photonic crystal microcavity. Resonant photoluminescence was observed from the single Ge dot in the cavity.
Elastic constants and Fermi surface topology change in Calaverite AuTe2: A density functional study
Structural, elastic, electronic and Fermi surface studies of AuTe2 have been carried out by means of first principles calculations based on density functional theory. The calculated ground state properties agree well with the experiment. Fermi surface and elastic constants are predicted for the first time and from the…
Changes of Band Gap Structure of 1-D Quasi-Periodic Photonic Crystal at Angular Incidence
The transmission spectra of 1-D quasi-periodic photonic crystal of positive-negative index structure at angular incidence was studied by transfer matrix method. The results show that the photonic band gap structure changes along with different incidence angles, a new photonic band gap corresponding toω/ωpe=1 will appe…
Characterization on RF magnetron sputtered niobium pentoxide thin films
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation N. Usha, R. Sivakumar, C. Sanjeeviraja; Characterization on RF magnetron sputtered niobium pentox…
Legal aspects of handling and disposal of nuclear waste – an Indian perspective
India's rise as a global power has made it an extremely lucrative market, especially in the field of nuclear energy. Nuclear energy is often painted as a ‘clean’ energy option, and therefore a solution to climate change. Splitting the atom doesn't produce greenhouse gases, but the nuclear fuel cycle is far from clean:…
Large Photo-Induced Group Delay Variations in Chalcogenide-on-Silicon Mach-Zehnder Interferometers
The rapid post-fabrication trimming of the group index in hybrid chalcogenide-on-silicon Mach-Zehnder interferometers is demonstrated. Index changes of 0.065 are achieved through photo-induced mass transfer in an As10Se90 layer.
EVALUATION ON LEACHING BEHAVIOR OF CEMENTITIOUS NUCLEAR WASTE FORM WITH USING ELECTRICAL TREATMENT
セシウムあるいはストロンチウムを含む放射性廃棄物固化処理体を模擬したセメント硬化体に対し、長期間にわたる溶脱現象に伴う物性変化に関する情報を短期間で取得することを目的とした電気的促進試験を用いて、放射性廃棄物セメント固化体の溶脱挙動を評価した。さらに、浸漬試験（拡散現象）による溶脱挙動と比較することにより、実際の溶脱現象との差異について検討し、変質評価手法としての電気的促進法の適用性について考察した。浸漬試験に比べて電気的促進試験における硝酸セシウムならびにカルシウムアルミネート相の溶脱と同時に、空隙が粗となり連続性の高い空隙構造を形成する現象が著しく速くなることを確認することができた。
Top Limit Characteristics of Cascade Tunnel Structure Silicon PCs
A new type homogeneous planar photoelectric converter (PC) on the basis of multijunction semiconductor n+-p-p+(t)n+-p-p+(t)…(t)n+-p-p+ tunnel silicon structure has been investigated. The entire structure is a cascade PC consisting of a number of elements of the structure – single PCs connected in series by tunnel laye…
Fluorescence from a quantum dot and metallic nanosphere hybrid system
We present energy absorption and interference in a quantum dot-metallic nanosphere system embedded on a dielectric substrate. A control field is applied to induce dipole moments in the nanosphere and the quantum dot, and a probe field is applied to monitor absorption. Dipole moments in the quantum dot or the metal nan…
A proposed benchmark for simulation in radiographic testing
The purpose of this benchmark study is to compare simulation results predicted by various models of radiographic testing, in particular those that are capable of separately predicting primary and scatter radiation for specimens of arbitrary geometry.
Two-site diamond-like point defects as new single-photon emitters
In this small review, we recall two promising candidates for biomarker nanosystems, in which a two-site defect embedded in a diamond-like lattice makes a single-photon source. The two candidates are the silicon-vacancy defect in diamond, and the carbon antisite-vacancy pair in 4H silicon carbide.
Automatic sample Dewar for MX beam-line
It is very common for crystals of large biological macromolecules to show considerable variation in quality of their diffraction. In order to increase the number of samples that are tested for diffraction quality before any full data collections at the ESRF*, an automatic sample Dewar has been implemented. Conception…
Electronic structure calculations of positron lifetimes in nuclear materials: SiC and UO2
We present first-principles calculations of positron lifetimes of vacancy-type defects in two nuclear materials: SiC and UO2. We use a self-consistent positron lifetime calculation scheme based on the two-component density functional theory. Full defect relaxation due to both the creation of the vacancy and the presen…
Influence of Modifiers on the Structure and Properties of Composite Coatings System Ti-B-Fe
The paper studies how microalloying with amorphous boron (Bam) and zirconia (ZrO2) influences the structure and properties of boride coatings. Two factors are found to strongly affect the structure and phase formation in composite coatings produced by electron beam surfacing, especially when using thermoreactive powde…
Second Harmonic Light Scattering from Symmetric and Asymmetric Dipole Nanoantennas
We investigate second-harmonic scattering from symmetric and asymmetric metallic dipole nanoantennas with very small gaps. We clarify the role of field enhancement, antenna modes and symmetry on intensity and direction of the radiated second-harmonic light.
XANES study of Fe-implanted strontium titanate
Properties of strontium titanate SrTiO3 (STO) depend to a great extent on the substitutional dopants and defects of crystal structure. The ion beam implantation method was used for doping STO (001) crystals with Fe at different doses. Implanted samples were then annealed at 350°C in oxygen to induce recrystallization…