Results 71 to 80 of about 40,261 (187)
A study of some properties for substituted Li-ferrite using positron annihilation lifetime technique
Results in Physics, 2015 Positron annihilation lifetime spectroscopy (PALS) is used to investigate polycrystalline substituted Li-ferrite samples. The dray ceramic technique was used to prepare all investigated samples. The variation of positron annihilation parameters I1%, I2%,
E. Hassan Aly, A.M. Samy
doaj +1 more source
The sky distribution of 511 keV positron annihilation line emission as measured with INTEGRAL/SPI [PDF]
, 2007 The imaging spectrometer SPI on board ESA's INTEGRAL observatory provides us with an unprecedented view of positron annihilation in our Galaxy. The first sky maps in the 511 keV annihilation line and in the positronium continuum from SPI showed a ...
A. Strong +13 more
core +2 more sources
A spectroscopy approach to measure the gravitational mass of antihydrogen
, 2013 We study a method to induce resonant transitions between antihydrogen ($\bar{H}$) quantum states above a material surface in the gravitational field of the Earth.
Dalkarov, O. D. +8 more
core +3 more sources
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
Distribution of Positron Annihilation Lifetime Components
مجلة بغداد للعلوم, 2008 The intensities of the positron annihilation lifetime components are shown to be related to the free volume model, and the theoretical value of the ratio between the singlet to the triplet state intensities, described by the ratio η, is shown to follow ...
Ahmed Abdul-Razzaq Selman +1 more
doaj +1 more source
Positron Annihilation Spectroscopy in Material studies
, 2019 Positron annihilation spectroscopy (PAS) is a method dedicated to detection of openvolume type of defects. Nowadays, this technique is of a great interest due to the practical character of obtained results.
P. Horodek +4 more
semanticscholar +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
Positron annihilation lifetime spectroscopy study of roller burnished magnesium alloy
Nukleonika, 2015 The effect of roller burnishing on Vickers’ hardness and positron lifetimes in the AZ91HP magnesium alloy was studied. The microhardness increases with an increase in the burnishing force and with a decrease in the feed. The comparison of various methods
Zaleski Radosław +2 more
doaj +1 more source
Performance of three-photon PET imaging: Monte Carlo simulations
, 2005 We have recently introduced the idea of making use of three-photon positron annihilations in positron emission tomography. In this paper the basic characteristics of the three-gamma imaging in PET are studied by means of Monte Carlo simulations and ...
Charlton M +6 more
core +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