Results 31 to 40 of about 40,261 (187)

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

Positron Annihilation Spectroscopy as a Diagnostic Tool for the Study of LiCoO₂ Cathode of Lithium-Ion Batteries

Condensed Matter, 2021
Positron annihilation spectroscopy using lifetime and Doppler broadening allows the characterization of the lithiation state in LiCoO2 thin film used in cathode of lithium-ion batteries.
Gioele Pagot, Valerio Toso, Bernardo Barbiellini, Rafael Ferragut, Vito Di Noto   +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

Development of a PbWO4 Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment [PDF]

, 2019
We have developed a PbWO4 (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium (o-Ps) cloud it creates.
Choi, J. J., Chung, M., Clade, P., Comini, P., Crepin, P-P, Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Froehlich, P., Guellati, S., Heinrich, J., Hervieux, P-A, Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, S., Karr, J-P, Kim, B. H., Kim, E-S, Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A. M. M., Leveque, K., Lim, E., Liszkay, L., Lotrus, P., Louvradoux, T., Lunney, D., Manfredi, G., Mansoulie, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V. V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K. H., Paul, N., Perez, P., Radics, B., Regenfus, C., Reynaud, S., Rousse, J-Y, Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., van der Werf, D. P., Voronin, A., Welker, A., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K-H   +66 more
core   +3 more sources

Analysis of electron-positron momentum spectra of metallic alloys as supported by first-principles calculations [PDF]

, 2007
Electron-positron momentum distributions measured by the coincidence Doppler broadening method can be used in the chemical analysis of the annihilation environment, typically a vacancy-impurity complex in a solid.
A. Dupasquier, C. Kittel, G. Dlubek, G. Dlubek, H. E. Schaefer, H. E. Schaefer, I. Makkonen, M. J. Puska, P. Folegati, P. Kirkegaard, R. Ferragut, R. Ferragut, R. K. W. Marceau, Y. Nagai, Y. Nagai   +14 more
core   +2 more sources

Tracking defect-induced ferromagnetism in GaN:Gd [PDF]

, 2011
We report on the magnetic properties of GaN:Gd layers grown by molecular beam epitaxy (MBE). A poor reproducibility with respect to the magnetic properties is found in these samples.
Amilcar Bedoya-Pinto, Angela Rizzi, Christian Rauch, Filip Tuomisto, Joerg Malindretos, Martin Roever, Z. Lipinska   +6 more
core   +2 more sources

Positron Annihilation Spectroscopy of Active Galactic Nuclei

Journal of Astronomy and Space Sciences, 2019
A regular and random components in the fluxes of quanta and particles from AGN is investigated. We consider the diffuse component and detect radiative feedback after the passage of cosmic rays and quanta through AGN.
Alexander V. Yushchenko, Yeuncheol Jeong   +1 more
doaj   +1 more source

Positron Annihilation Spectroscopy in Materials and Technical Details of Measurement Systems [PDF]

فصلنامه علوم و فناوری فضایی, 2013
Being a very powerful method, Positron Annihilation Spectroscopy (PAS) has been widely used for investigation of defects type and concentration in materials in recent years.
A. A. Mehmandoost-Khajeh-Dad, M. Khaghani, M. Jafarzadeh-Khatibani   +2 more
doaj  

Detection of phase separation of neutron-irradiated Fe–Cr binary alloys using positron annihilation spectroscopy

Nuclear Materials and Energy, 2018
Phase separation in Fe–Cr binary alloys irradiated with neutrons at 473 K and 573 K was investigated using positron annihilation spectroscopy. Using positron annihilation coincidence Doppler broadening (CDB) measurements, the phase separation progress ...
Y. Noshita, K. Sato, H. Yamashita, R. Kasada, Q. Xu, M. Hatakeyama, S. Sunada   +6 more
doaj   +1 more source

A study of vacancy defects related to gray tracks in KTiOPO4 (KTP) using positron annihilation

AIP Advances, 2014
For the first time to our knowledge, positron annihilation spectroscopy (PAS) was used to study vacancy defects in KTiOPO4 (KTP) single crystals. Positron annihilation lifetime spectroscopy combined with dielectric measurements identified the existence ...
Yang Zhang, Jing Li, Xingzhong Cao, Jing Yang, Jiyang Wang, Huaidong Jiang   +5 more
doaj   +1 more source