Results 81 to 90 of about 1,771,729 (203)

Single-shot positron annihilation lifetime spectroscopy with LYSO scintillators [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016
We have evaluated the application of a lutetium yttrium oxyorthosilicate (LYSO) based detector to single-shot positron annihilation lifetime spectroscopy. We compare this detector directly with a similarly configured PbWO4 scintillator, which is the usual choice for such measurements. We find that the signal to noise ratio obtained using LYSO is around
Alonso, A. M., Cooper, B. S., Deller, A., Cassidy, D. B.   +3 more
openaire   +3 more sources

Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects

Nuclear Materials and Energy
Polycrystalline 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, M. Dickmann, W. Egger, M. Zibrov, Ł. Ciupiński   +4 more
doaj   +1 more source

Investigation of Positron Annihilation Lifetime Spectroscopy and Tensile behavior of Graphene Oxide/Epoxy Nanocomposites [PDF]

Journal of Advanced Materials in Engineering
Introduction and Objectives: Positron Annihilation Lifetime Spectroscopy is a sensitive method for investigating the free volume in polymers at the atomic scale, enabling the determination of pore size, shape, and concentration.
Mohammad Koohkan, Ali Akbar Mehmandoost-Khajeh-Dad, Hamed Khosravi   +2 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, G. S. Kanda, M. V. Yakushev, E. E. Abdel-Hady, D. J. Keeble   +4 more
doaj   +1 more source

Positron Annihilation Spectroscopy Study on Annealing Effect of CuO Nanoparticles [PDF]

Materials Research, 2016
The microstructure and defects of CuO nanoparticles under isochronal annealing were investigated by positron annihilation spectroscopy (PAS), X-ray diffraction (XRD) and scanning electron microscope (SEM).
Jianjian Shi, Jiaheng Wang, Wei Yang, Zhejie Zhu, Yichu Wu   +4 more
doaj   +2 more sources

Positron annihilation lifetime and Doppler broadening spectroscopy at the ELBE facility [PDF]

AIP Conference Proceedings, 2018
The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA with bunch charges up to 120 pC. The electron beam is employed to produce several secondary beams including X-rays from bremsstrahlung production, coherent IR light in a Free Electron ...
Andreas Wagner, Maik Butterling, Maciej O. Liedke, Kay Potzger, Reinhard Krause-Rehberg   +4 more
openaire   +1 more source

Theranostic Advancements in Brain Cancer: Promising Approaches for Emerging Therapy

MedComm – Oncology, Volume 5, Issue 2, June 2026.
Strategies for improving intra‐arterial administration (A) and photodynamic therapy in brain cancer (B). Improving intra‐arterial (IA) administration and photodynamic therapy (PDT) for brain cancer involves enhancing tumor targeting and breaching the blood–brain barrier (BBB). Key strategies include super selective catheterization, using osmotic agents
Bipraban Khanra, Manoj Kumar Sarangi
wiley   +1 more source

Novel System for Potential Nondestructive Material Inspection Using Positron Annihilation Lifetime Spectroscopy

, 2011
A new positron annihilation lifetime spectrometer consisting of a start γ-ray detector, a stop γ-ray detector, a digital oscilloscope, and a positron detector, which is a plastic scintillator coupled to a photomultiplier tube, is described.
Yoshinori Kobayashi, Yoshihiro Watanabe, Masato Yamawaki, Kanehisa Hattori   +3 more
core   +1 more source

DDRS4PALS: A software for the acquisition and simulation of lifetime spectra using the DRS4 evaluation board

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

Advances in BiOCl‐Based Photocatalysts: From Synthesis, Structural Tailoring to Solar Energy Conversion

Rare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Semiconductor photocatalysis represents a pivotal frontier in the quest for sustainable energy and environmental remediation. Among the diverse catalytic materials, Bismuth Oxychloride (BiOCl) has emerged as a particularly promising candidate due to its unique layered structure, featuring [Bi2O2]2+ layers intertwined with halogen ions, which ...
Liu Han, Bin Wu, Jie Wang, Yang Su, Yingtang Zhou, Zhongyi Jiang   +5 more
wiley   +1 more source