Results 81 to 90 of about 9,908 (221)
, 2007 Crystal defects in magnesium and magnesium based alloys like AZ31 are of major importance for the understanding of their macroscopic properties. We have investigated defects and their chemical surrounding in Mg and AZ31 on an atomic scale with Doppler ...
A. Dupasquier +17 more
core +1 more source
Principles of positron porosimetry
Nukleonika, 2015 The paper deals with positron porosimetry (PP), which is based on positron annihilation lifetime spectroscopy (PALS). The numerical analysis of positron lifetime spectra for PP is more demanding than in most of other applications of PALS.
Zaleski Radosław
doaj +1 more source
Molecular Cages Based Materials for CO2 Capture, Separation, and Conversion
EcoMat, Volume 8, Issue 2, February 2026.Molecular cages (MCs), boasting soluble, regenerable traits and precisely tunable structures, exhibit substantial potential for efficient CO2 capture, separation, and conversion. This review thoroughly explores MCs' recent advancements, analyzes current unresolved challenges, and provides forward‐looking perspectives to tackle pressing carbon‐related ...
Ding Zou +4 more
wiley +1 more source
Small Structures, Volume 7, Issue 2, February 2026.Ab initio thermodynamics and GCMC simulations reveal a cooperative two‐step CO2 pore filling mechanism in CALF‐20. The study captures adsorption energetics and loading‐dependent structural changes, reproducing experimental isotherms with chemically accurate predictions.
Kaido Sillar +3 more
wiley +1 more source
Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects
Nuclear Materials and EnergyPolycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to three different damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K.
B. Wieluńska-Kuś +4 more
doaj +1 more source
Characterization of vacancy defects in Cu(In,Ga)Se2 by positron annihilation spectroscopy
AIP Advances, 2016 The photovoltaic performance of Cu(In1-x,Gax)Se2 (CIGS) materials is commonly assumed to be degraded by the presence of vacancy-related defects. However, experimental identification of specific vacancy defects remains challenging.
M. R. M. Elsharkawy +4 more
doaj +1 more source
A Positron Lifetime Study of Cooling and Natural Aging of Solutionized Aluminum Alloys
Advanced Engineering Materials, Volume 28, Issue 2, January 21, 2026.The process during cooling of Al–Mg and Al–Mg–Si alloys from the solutionizing temperature down to 20 °C is interrupted. These states are analyzed with positron lifetime spectroscopy to trace the processes during cooling. In different temperature ranges, two stages of vacancy loss and solute clustering are identified.
Zi Yang, Mengjie Li, John Banhart
wiley +1 more source
A trap-based pulsed positron beam optimised for positronium laser spectroscopy [PDF]
, 2015 We describe a pulsed positron beam that is optimised for positronium (Ps) laser-spectroscopy experiments. The system is based on a two-stage Surko-type buffer gas trap that produces 4 ns wide pulses containing up to 5 × 105 positrons at a rate of 0.5-10 ...
A. Deller +6 more
core +2 more sources
SoftwareX, 2019 Lifetime techniques are applied to diverse fields of study including materials sciences, semiconductor physics, biology, molecular biophysics and photochemistry.Here we present DDRS4PALS, a software for the acquisition and simulation of lifetime spectra ...
Danny Petschke, Torsten E.M. Staab
doaj +1 more source
Journal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.Dissolved hydrogen‐induced plasticization of polyamide 11 (PA11) detected as a decrease in flexural modulus (E f) using Cyclic Three‐Point Bending (Cyc‐3PB). ABSTRACT The effect of dissolved hydrogen on polyamide 11 (PA11) after decompression from a 90 MPa hydrogen gas environment was investigated. Structural analyses using wide‐angle X‐ray diffraction
Hiroaki Ono +6 more
wiley +1 more source