Results 1 to 10 of about 494,691 (265)

Fast high-resolution lifetime image reconstruction for positron lifetime tomography [PDF]

Communications Physics
Due to the ortho-positronium formed prior to the annihilation, the lifetime of a positron is sensitive to the tissue microenvironment and can potentially provide valuable information for monitoring disease progression and treatment response. However, the
Bangyan Huang, Zipai Wang, Xinjie Zeng, Amir H. Goldan, Jinyi Qi   +4 more
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Defect Characterization of the SiO₂/Si Interface Investigated by Drift-Assisted Positron Annihilation Lifetime Spectroscopy [PDF]

Nanomaterials
This study demonstrates drift-assisted positron annihilation lifetime spectroscopy on a p-type (100) silicon substrate in a MOS capacitor, using an applied electric field to control the spatial positron distribution prior to annihilation.
Ricardo Helm, Werner Egger, Catherine Corbel, Peter Sperr, Maik Butterling, Andreas Wagner, Maciej Oskar Liedke, Eric Hirschmann, Johannes Mitteneder, Michael Mayerhofer, Kangho Lee, Georg S. Duesberg, Günther Dollinger, Marcel Dickmann   +13 more
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First positronium lifetime imaging using 52Mn and 55Co with a plastic-scintillator-based PET scanner [PDF]

Scientific Reports
This study demonstrates the applicability of $$^{52}$$ Mn and $$^{55}$$ Co radionuclides for positronium imaging. Positronium Lifetime Imaging (PLI) extends positron emission tomography by using the lifetime of positronium atoms as a probe of tissue ...
Manish Das, Sushil Sharma, Ermias Yitayew Beyene, Aleksander Bilewicz, Jarosław Choiński, Neha Chug, Catalina Curceanu, Eryk Czerwiński, Jakub Hajduga, Sharareh Jalali, Krzysztof Kacprzak, Tevfik Kaplanoglu, Łukasz Kapłon, Kamila Kasperska, Aleksander Khreptak, Grzegorz Korcyl, Tomasz Kozik, Karol Kubat, Deepak Kumar, Sumit Kumar Kundu, Anoop Kunimmal Venadan, Edward Lisowski, Filip Lisowski, Justyna Medrala-Sowa, Simbarashe Moyo, Wiktor Mryka, Szymon Niedźwiecki, Anand Pandey, Piyush Pandey, Szymon Parzych, Alessio Porcelli, Bartłomiej Rachwał, Martin Rädler, Narendra Rathod, Noman Razzaq, Axel Rominger, Kuangyu Shi, Magdalena Skurzok, Maciej Słotwiński, Anna Stolarz, Tomasz Szumlak, Pooja Tanty, Keyvan Tayefi Ardebili, Satyam Tiwari, Kavya Valsan Eliyan, Rafał Walczak, Ewa Ł. Stepień, Paweł Moskal   +47 more
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Positron annihilation rate in point defects of reactor materials within the modified Tao - Eldrup model [PDF]

Ядерна фізика та енергетика, 2023
Theoretical concepts of the positron annihilation process in structural materials of nuclear reactors, taking into account the peculiarities of their electronic structure, have been developed.
M. I. Vorona, O. A. Lebed
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Influence of interference signals on spectrometer and measurement results in positron annihilation lifetime measurements

He jishu, 2023
BackgroundThe accurate acquisition and correlation coincidence of positron annihilation signal form the basis of the lifetime spectrum sensitive characterization of microscopic defects in materials.
WANG Lei, PENG Xionggang, ZHANG Hongqiang, YU Runsheng, ZHANG Peng, WU Haibiao, WU Yaru, WANG Baoyi, CAO Xingzhong, XIAO Detao, LIU Fuyan   +10 more
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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
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Positron Annihilation Lifetime Spectroscopy Insight on Free Volume Conversion of Nanostructured MgAl₂O₄ Ceramics

Nanomaterials, 2021
Herein we demonstrate the specifics of using the positron annihilation lifetime spectroscopy (PALS) method for the study of free volume changes in functional ceramic materials.
Halyna Klym, Ivan Karbovnyk, Sergei Piskunov, Anatoli I. Popov   +3 more
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Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy

Physical Review Accelerators and Beams, 2021
Submicron defects represent a well-known fundamental problem in manufacturing since they can significantly affect performance and lifetime of virtually any high-value component. Positron annihilation lifetime spectroscopy is arguably the only established
Thomas L. Audet, Aaron Alejo, Luke Calvin, Mark Hugh Cunningham, Glenn Ross Frazer, Gagik Nersisyan, Michael Phipps, Jonathan Richard Warwick, Gianluca Sarri, Nasr A. M. Hafz, Christos Kamperidis, Song Li, Daniel Papp   +12 more
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Effect of Plasma on Polyethylene by Positron Lifetime Spectroscopy [PDF]

علوم و تکنولوژی پلیمر, 2022
Hypothesis: The use of plasma is widely used as a method to change polymer surfaces. The use of atmospheric cold plasma has more advantages than other plasma, laser and X-ray methods. This method is simple and it uses inexpensive equipment.
Maryam Azizi, Mahdieh Bakhtiari Ramezani, Effat Yahaghi, Mojtaba Nohekhan   +3 more
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Analysis of the experimental positron lifetime spectra by neural networks [PDF]

Nuclear Technology and Radiation Protection, 2003
This paper deals with the analysis of experimental positron lifetime spectra in polymer materials by using various algorithms of neural networks. A method based on the use of artificial neural networks for unfolding the mean lifetime and intensity of the
Avdić Senada, Chakarova Roumiana, Pazsit Imre   +2 more
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