Results 41 to 50 of about 4,848 (208)

Correlated Wave Functions for Electron–Positron Interactions in Atoms and Molecules

Journal of Chemical Theory and Computation, 2022
The positron, as the antiparticle of the electron, can form metastable states with atoms and molecules before its annihilation with an electron. Such metastable matter–positron complexes are stabilized by a variety of mechanisms, which can have both ...
Jorge Charry Martinez, Matteo Barborini, A. Tkatchenko   +2 more
semanticscholar   +1 more source

Radiationless and inelastic processes contribution to the nuclear excitation at the positron-atomic electron annihilation [PDF]

Ядерна фізика та енергетика, 2007
The process of nuclear excitation at the positron-atomic electron annihilation was considered. It is offered a new definition for the part of positrons, which excite nuclei at the annihilation.
S. N. Fedotkin, V. A. Zheltonozhskii
doaj  

Positron-electron annihilation momentum transfer to trapped deuterons

AIP Advances, 2019
The probability of positron annihilation momentum transfer to a trapped deuteron is calculated based on neutron measurements from 2H(d,n)3He reactions in deuterated palladium thin films. Deuterium gas loading in Pd thin films creates a high D/Pd fraction
Ryan Weed, Dante Sblendorio, Joshua Machacek, Bala Ramamurthy, Gabrielle Laguisma   +4 more
doaj   +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

Electron–Positron Pair Creation Close to a Black Hole Horizon: Redshifted Annihilation Line in the Emergent X-Ray Spectra of a Black Hole. I. [PDF]

Astrophysical Journal, 2018
We consider a Compton cloud (CC) surrounding a black hole (BH) in an accreting BH system, where electrons propagate with thermal and bulk velocities. In that cloud, soft (disk) photons may be upscattered off these energetic electrons and attain energies ...
P. Laurent, L. Titarchuk
semanticscholar   +1 more source

Atomic ionization at positron annihilation at β+-decay with taking into account screening [PDF]

Ядерна фізика та енергетика, 2012
The role of the nuclear charge screening and correctness of Born approximation for electron which is leaving atom in the process of atomic ionization at annihilation of positron with another electron of daughter's atom at β+-decay is studied. Processes
S. N. Fedotkin
doaj  

Tailoring Advanced Metal‐Based Nanomedicines for Adaptable Nanodynamic Disease Therapies and Theranostics

Advanced Materials, EarlyView.
This review summarizes recent advances in metal‐based nanomaterials (MBNs) as multifunctional platforms for next‐generation diagnostics and nanodynamic therapies (NDTs), highlighting their structural tunability, diverse therapeutic modalities, and broad biomedical applications in oncology and infectious disease control.
Qihang Ding, Wenhao Li, Ling Mei, Suling Luo, Jing Tao, Chongxiu Shi, Hongping Yang, Wei Feng, Yungchang Chen, Yu Chen, Jong Seung Kim, Xue Shen   +11 more
wiley   +1 more source

Paradoxical Topological Soliton Lattice in Anisotropic Frustrated Chiral Magnets

Advanced Science, EarlyView.
The article describes the discovery of a stable skyrmion‐antiskyrmion lattice (S‐AL) in anisotropic frustrated chiral magnets. This lattice has a net‐zero topological charge due to a balanced population of skyrmions and antiskyrmions. This is a paradoxical finding since these particles normally annihilate each other.
Sayan Banik, Nikolai S. Kiselev, Ashis K. Nandy   +2 more
wiley   +1 more source

The all-sky distribution of 511 keV electron-positron annihilation emission [PDF]

, 2005
We present a map of 511 keV electron-positron annihilation emission, based on data accumulated with the SPI spectrometer aboard ESA's INTEGRAL gamma-ray observatory, that covers approximately 95% of the celestial sphere.
J. Knödlseder, P. Jean, V. Lonjou, G. Weidenspointner, N. Guessoum, W. Gillard, G. Skinner, P. V. Ballmoos, G. Vedrenne, J. Roques, S. Schanne, B. Teegarden, V. Schönfelder, C. Winkler   +13 more
semanticscholar   +1 more source