Results 51 to 60 of about 41,858 (234)

Selective Production of Rydberg-Stark States of Positronium [PDF]

, 2015
Rydberg positronium (Ps) atoms have been prepared in selected Stark states via two-step (1s→2p→nd/ns) optical excitation. Two methods have been used to achieve Stark-state selection: a field ionization filter that transmits the outermost states with ...
Alonso, AM, Cassidy, DB, Cooper, BS, Deller, A, Hogan, SD, Wall, TE   +5 more
core   +2 more sources

Study of irradiation-induced vacancy-type defects in tungsten using positron annihilation spectroscopy

Nuclear Materials and Energy, 2023
Tungsten has been considered as a potential candidate material for the application of plasma-facing components in magnetic confinement fusion reactors. Fusion neutrons introduce severe displacement damage into the first-wall materials along with a high ...
Renjith Ramachandran, S. Balaji
doaj   +1 more source

On the effect of atomic layer deposited Al2O3 on the environmental degradation of hybrid perovskite probed by positron annihilation spectroscopy

Journal of Materials Chemistry C, 2019
Doppler broadening-positron annihilation spectroscopy (DB-PAS) provides insights into the structural degradation of pristine and ALD Al2O3 capped CH3NH3PbI3−xClx under ambient air exposure.
D. Koushik, F. Naziris, J. Melskens, Amber Nusteling, V. Zardetto, H. Schut, W. Kessels, S. Eijt, M. Creatore   +8 more
semanticscholar   +1 more source

Positron annihilation spectroscopy on a beam of positrons the LEPTA facility

EPJ Web of Conferences, 2017
The results and possibilities of the samples surfaces research by the Doppler method of positron annihilation spectroscopy (PAS) for a monochromatic beam of positrons at the LEPTA facility are presented in this paper.
Ahmanova E.V., Eseev M.K., Kobets A.G., Meshkov I.N., Orlov O.S., Sidorin A.A., Siemek K., Horodek P.   +7 more
doaj   +1 more source

Study of the optimal conditions for NV- center formation in type 1b diamond, using photoluminescence and positron annihilation spectroscopies

, 2011
We studied the parameters to optimize the production of negatively-charged nitrogen-vacancy color centers (NV-) in type~1b single crystal diamond using proton irradiation followed by thermal annealing under vacuum.
A. Zaitsev, B. Courtois, E. Leoni, F. Jelezko, F. Treussart, H.-C. Chang, J. Botsoa, M.-F. Barthe, M.-P. Adam, P. Desgardin, R. Krause-Rehberg, T. Sauvage   +11 more
core   +1 more source

Defect Analysis of the β– to γ–Ga2O3 Phase Transition

Advanced Functional Materials, EarlyView.
The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas, Maciej O. Liedke, Huan Liu, Fabian Ganss, Maik Butterling, Nico Klingner, René Hübner, Ilja Makkonen, Andreas Wagner, Gregor Hlawacek   +9 more
wiley   +1 more source

Ion‐Selective Microporous Membranes via One‐Step Copolymerization Enable High‐Performance Redox Flow Batteries

Advanced Functional Materials, EarlyView.
A scalable one‐step copolymerization strategy is developed to produce low‐cost microporous ion exchange membranes that boost both the efficiency and lifespan of flow batteries. When combined with organic electrolytes in aqueous systems, these membranes enable safe and cheap flow battery energy storage, supporting the widespread integration of renewable
Jiaye Liu, Chunchun Ye, Ying Ma, Rui Tan, Xiangwen Wang, Huiting Zhang, Peng Song, Quan‐Fu An   +7 more
wiley   +1 more source

Effect of Dissolved Hydrogen on Polyamide 11: Observation During Hydrogen Desorption Process After Decompression at Atmospheric Pressure

Journal of Applied Polymer Science, EarlyView.
Dissolved hydrogen‐induced plasticization of polyamide 11 (PA11) detected as a decrease in flexural modulus (Ef) 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, Youhei Fujii, Shunsuke Nagano, Masahiro Kasai, Keiko Ohyama, Hirotada Fujiwara, Shin Nishimura   +6 more
wiley   +1 more source

Positronium in a liquid phase: formation, bubble state and chemical reactions

, 2012
This chapter reviews the following items: 1. Energy deposition and track structure of fast positrons: ionization slowing down, number of ion-electron pairs, typical sizes, thermalization, electrostatic interaction between e+ and its blob, effect of local
Byakov, Vsevolod M., Duplatre, Gilles, Nurmukhametov, Roman R., Stepanov, Petr S., Stepanov, Sergey V., Zvezhinskiy, Dmitrii S.   +5 more
core   +2 more sources

Advancements in Targeted Radiopharmaceuticals: Innovations in Diagnosis and Therapy for Enhanced Cancer Management

ChemBioChem, EarlyView.
Radiopharmaceuticals enable precise cancer diagnosis and targeted therapy by combining radioactive isotopes with carrier molecules. This review summarizes advances from 2014 to 2025, emphasizing probe design, click chemistry, novel targets, and nanodelivery systems.
Mohd Sayeed Shaikh, Rupesh R. Kurhade, Abrar A. M. Siddiqui, Shaikh Shahbaz A. Majeed, Thomas J. Webster, Mohammad Intakhab Alam, Abdul Wasy Zia, Md. Faiyazuddin   +7 more
wiley   +1 more source