Results 111 to 120 of about 41,858 (234)

Hydrogen-Induced Microstructure Changes in Zr/Nb Nanoscale Multilayer Structures

Metals
Zr/Nb nanoscale multilayer coatings (NMCs) were studied after hydrogenation in a gaseous environment at 400 °C. The hydrogen distribution and content were determined by pressure and hydrogenation time.
Roman Laptev, Ekaterina Stepanova, Anton Lomygin, Dmitriy Krotkevich, Alexey Sidorin, Oleg Orlov   +5 more
doaj   +1 more source

Defect Imaging and Detection of Precipitates Using a New Scanning Positron Microbeam

, 2017
We report on a newly developed scanning positron microbeam based on threefold moderation of positrons provided by the high intensity positron source NEPOMUC.
Beddrich, Lukas, Dickmann, Marcel, Gigl, Thomas, Hugenschmidt, Christoph, Rienäcker, Benjamin, Thalmayr, Matthias, Vohburger, Sebastian   +6 more
core   +1 more source

Advances in applications of positron annihilation spectroscopy to investigating semiconductor microstructures

, 2017
Positron annihilation spectroscopy has unique advantage for detecting the micro-defects and microstructures in materials,especially for investigating the negatively charged defects such as cation vacancies in semiconductors.It is a powerful tool to ...
Cao Xingzhong, Song Li-gang, Jin Shuoxue, Zhang Ren-gang, Wang Baoyi, W. Long   +5 more
semanticscholar   +1 more source

Influence of oversized atoms X = Ti, Ta, W, Mo on the dynamics of native defects under annealing in Fe35Cr35V20Cu5-(X) HEA studied by positron annihilation spectroscopy (PAS)

Nuclear Engineering and Technology
The dynamics of native defects in the high entropy alloy family produced by arc melting Cu5Cr35Fe35V20X5 (at. %), where X = Ti, Ta, W or Mo corresponds to oversized atoms, were studied using positron annihilation lifetime spectroscopy (PALS) and ...
R. Domínguez-Reyes, M.A. Monge, A. Rodríguez-López, Y. Ortega, B. Savoini   +4 more
doaj   +1 more source

Slow positron beam at the JINR, Dubna

Nukleonika, 2015
The Low Energy Positron Toroidal Accumulator (LEPTA) at the Joint Institute for Nuclear Research (JINR) proposed for generation of positronium in flight has been adopted for positron annihilation spectroscopy (PAS).
Horodek Paweł, Kobets Andrey G., Meshkov Igor N., Sidorin Alexey A., Orlov Oleg S.   +4 more
doaj   +1 more source

Positron Annihilation Spectroscopy Study of Metallic Materials after High-Speed Cutting. [PDF]

Materials (Basel), 2022
Li J, Laptev R, Bordulev I, Siemek K, Horodek P, Shen H, Lomygin A, Cui J.   +7 more
europepmc   +1 more source

Effect of positron-atom interactions on the annihilation gamma spectra of molecules

, 2012
Calculations of gamma spectra for positron annihilation on a selection of molecules, including methane and its fluoro-substitutes, ethane, propane, butane and benzene are presented. The annihilation gamma spectra characterise the momentum distribution of
Akhiezer A I, Armour E A G, Armour E A G, Armour E A G, Berestetskii V B, C M Surko, Cooper J N, Cotton F A, D G Green, Dunlop L J M, Dunlop L J M, F Wang, G F Gribakin, Gaussian M J Frisch, Green D G, Green D G Gribakin G F, Green D G Gribakin G F, Gribakin G F, Laricchia G, McCarthy I E, Pomeranchuk I, Reeth P V, S Saha, Slater J C, Varshalovich D A, Wang F, Wang F, Wright G L, Zhang R   +28 more
core   +1 more source

Positron annihilation studies of high-manganese steel deformed by rolling

Nukleonika, 2015
Positron annihilation spectroscopy (PAS) has been used to study the annealing behavior of cold rolled Fe – 21 wt% Mn steel with 0.05 wt% C. After the initial annealing of defects shown by Doppler broadening of the annihilation line, a slight increase in ...
Dryzek Ewa, Sarnek Maciej, Wróbel Mirosław   +2 more
doaj   +1 more source

Source for In Situ Positron Annihilation Spectroscopy of Thermal-And Hydrogen-Induced Defects Based on the Cu-64 Isotope. [PDF]

Materials (Basel), 2021
Bordulev I, Laptev R, Kabanov D, Ushakov I, Kudiiarov V, Lider A.   +5 more
europepmc   +1 more source

Determination of Dark Matter Properties at High-Energy Colliders

, 2006
If the cosmic dark matter consists of weakly-interacting massive particles, these particles should be produced in reactions at the next generation of high-energy accelerators.
Baltz, Edward A., Battaglia, Marco, Peskin, Michael E., Wizansky, Tommer   +3 more
core   +1 more source