Results 91 to 100 of about 40,261 (187)

Synthesis, characterization, and sensitivity tests of La0.8Ba0.1Bi0.1FeO3 nanoparticles towards a few parts-per-billion of acetone gas

Heliyon
In the present paper, the La0.8Ba0.1Bi0.1FeO3 powders were synthesized via the auto-combustion method. The optical, the positron annihilation spectroscopy and the gas sensing properties of our sample were investigated simultaneously.
E.M. Benali, L. Saher, A. Benali, M. Bejar, E. Dhahri, Jiangtao Wu, Lin Peng, P.M. Gordo, J. Pina, B.F.O. Costa   +9 more
doaj   +1 more source

Sequential ion irradiations on Fe-Cr and ODS Fe-Cr alloys

Nuclear Materials and Energy, 2020
Oxide dispersion strengthened steels are candidate materials for nuclear reactor applications due to a powerful combination of properties, such as reduced activation, high-temperature strength and increased creep resistance.
M. Šćepanović, T. Leguey, I. García-Cortés, F.J. Sánchez, C. Hugenschmidt, M.A. Auger, V. de Castro   +6 more
doaj   +1 more source

Positron annihilation spectroscopy with magnetically analyzed beams [PDF]

Lifetime measurements with magnetically analyzed positron beams were made in condensed media with uniform and non-uniform properties. As expected, the lifetime values with magnetically analyzed positron beams in uniform targets are similar to those ...
Holt, W. H., Mock, W., Jr., Singh, J. J.
core   +1 more source

Proposed parameter-free model for interpreting the measured positron annihilation spectra of materials using a generalized gradient approximation

, 2015
Positron annihilation spectroscopy is often used to analyze the local electronic structure of materials of technological interest. Reliable theoretical tools are crucial to interpret the measured spectra.
Barbiellini, Bernardo, Kuriplach, Jan
core   +1 more source

Proposition of Hyper‐Chemical Exchange Saturation Transfer Subtraction Spectroscopy to Detect Very Weak and Broad Signals Hidden Under Baseline and Widen Range of Materials Accessed by Hyperpolarized 129Xe NMR

ChemPhysChem, Volume 26, Issue 23, November 28, 2025.
A polyimide sample, for which hyperpolarized 129Xe NMR spectroscopy failed to detect 129Xe embedded in the polymer (Inset A), is found to give a very broad peak, line width 11 kHz at 206.5 ppm, by applying the stopped‐flow hyper‐chemical exchange saturation transfer subtraction spectroscopy on the continuous‐flow recirculating hyper‐polarization system
Hideaki Fujiwara, Hirohiko Imai, Atsuomi Kimura   +2 more
wiley   +1 more source

Studies of stainless steel exposed to sandblasting

Nukleonika, 2015
The influence of sandblasting on surface and subsurface of stainless steel is investigated using variable energy positron beam (VEP), positron annihilation spectroscopy (PAS), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Samples
Horodek Paweł, Eseev Marat K., Kobets Andrey G.   +2 more
doaj   +1 more source

Potential for biomedical applications of Positron Annihilation Lifetime Spectroscopy (PALS)

, 2018
Positron Annihilation Lifetime Spectroscopy (PALS) allows examining structure of materials in nano and sub-nanometer scale. This technique is based on the lifetime and intensity of ortho-positronium atoms in free volumes of given structures. It is mostly
Kubicz, Ewelina
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

Nuclear-Astrophysics Lessons from INTEGRAL

, 2013
Measurements of high-energy photons from cosmic sources of nuclear radiation through ESA's INTEGRAL mission have advanced our knowledge: New data with high spectral resolution showed that characteristic gamma-ray lines from radioactive decays occur ...
Diehl, Roland
core   +1 more source

First Production and Detection of Cold Antihydrogen Atoms

, 2003
The ATHENA experiment recently produced the first atoms of cold antihydrogen. This paper gives a brief review of how this was achieved.Comment: Invited talk at Int. Conf. on Low Energy Antiprotons 2003 (LEAP03), to be published in NIM
A. Bouchta, A. Fontana, A. Rotondi, A. Variola, Amoretti, Amoretti, Arkani-Hamed, Baur, Bertolami, Bigi, Blanford, C. Amsler, C. Carraro, C. Regenfus, C.L. Cesar, D. Lindelöf, D.P. van der Werf, Dolgov, E. Lodi Rizzini, Ellis, Fischback, Fujiwara, Fujiwara, G. Bonomi, G. Testera, Gabrielse, Gabrielse, Gabrielse, Gabrielse, Goldston, H. Pruys, Hagiwara, J.S. Hangst, Jørgensen, Kleppner, Kobayashi, L.V. Jørgensen, Luders, M. Amoretti, M. Charlton, M. Doser, M. Macri, M. Marchesotti, M.C. Fujiwara, Murayama, N. Madsen, P. Bowe, P. Genova, P. Montagna, P. Rielder, R. Funakoshi, R. Landua, R.S. Hayano, Regenfus, Surko, V. Filippini, V. Lagomarsino   +56 more
core   +1 more source