Results 101 to 110 of about 1,787,488 (253)

Experimental activation assessment of open‐type yoke in a PET cyclotron by non‐destructive/destructive γ‐ray measurement approaches

Medical Physics, Volume 53, Issue 9, September 2026.
Abstract Background During decommissioning of positron emission tomography (PET) cyclotron facilities, metallic components—including the iron yoke—are typically classified as radioactive waste, incurring substantial disposal costs. In contrast to concrete, standardized decommissioning procedures for metallic components have not yet been established ...
Go Yoshida, Hiroshi Matsumura, Akihiro Toyoda, Hajime Nakamura, Kazuyoshi Masumoto, Taichi Miura, Eisuke Watanabe, Kiyokazu Tsugane, Katsuhiko Saito, Iwane Koumura, Hiroyuki Uno, Masahiko Kozaki, Ayumi Yamamoto, Jun Toyohara, Kei Wagatsuma   +14 more
wiley   +1 more source

Gallium vacancy and the residual acceptor in undoped GaSb studied by positron lifetime spectroscopy and photoluminescence

, 2002
Positron lifetime, photoluminescence (PL), and Hall measurements were performed to study undoped p-type gallium antimonide materials. A 314 ps positron lifetime component was attributed to Ga vacancy (V-Ga) related defect.
Zhao YW, Li KF, Cheah KW, Ling CC,Univ Hong Kong,Dept Phys,Pokfulam Rd,Hong Kong,Hong Kong,Peoples R China. 电子邮箱地址: ccling@hku.hk, Lam CH, Mui WK, Ling CC, Gong M, Fung S, Beling CD, Lui MK   +10 more
core  

Investigation of silver - glass nanocomposites by positron lifetime spectroscopy

, 1996
Nanocrystalline silver particles were grown in a glass medium by ion-exchange and reduction techniques and studied by positron lifetime spectroscopy. The particle sizes varied from 5 to about 25 nm as observed by transmission electron microscopy.
Mukherjee, M., Nambissan, P. M. G., Chakravorty, D.   +2 more
core   +1 more source

ATP changes the fluorescence lifetime of cyan fluorescent protein via an interaction with His148 [PDF]

, 2010
Contains fulltext : 87235.pdf (Publisher’s version ) (Open Access)Recently, we described that ATP induces changes in YFP/CFP fluorescence intensities of Fluorescence Resonance Energy Transfer (FRET) sensors based on CFP-YFP.
Marieke Willemse, Jalink Kees, Fransen, J.A.M., Jalink, K., Sergey P Laptenok, Krogt, G. van der, Krogt, G., Jan Willem Borst, Laptenok Sergey P., Jack A M Fransen, Slijkhuis Rik, Slijkhuis, R., Willemse, M.P., Fransen Jack A. M., Jack A. M. Fransen, Laptenok, S., Willemse, M., Borst, J.W., Wieringa, B., Borst Jan Willem, Gerard van der Krogt, Rik Slijkhuis, Kees Jalink, Sergey P. Laptenok, van der Krogt Gerard, Laptenok, S.P., Be Wieringa, Wieringa Be, Willemse Marieke   +28 more
core   +3 more sources

Positron annihilation spectroscopy on a beam of positrons the LEPTA facility

EPJ Web of Conferences, 2017
The results and possibilities of the samples surfaces research by the Doppler method of positron annihilation spectroscopy (PAS) for a monochromatic beam of positrons at the LEPTA facility are presented in this paper.
Ahmanova E.V., Eseev M.K., Kobets A.G., Meshkov I.N., Orlov O.S., Sidorin A.A., Siemek K., Horodek P.   +7 more
doaj   +1 more source

Emerging Metal–Organic Frameworks (MOFs): Synthesis, Bioactivities, Preservation, Active Packaging/Sensing System, and Future Perspectives for Seafood Applications

Journal of Food Science, Volume 91, Issue 9, September 2026.
ABSTRACT Seafood is highly susceptible to rapid microbial proliferation, lipid oxidation, and volatile spoilage compound accumulation, resulting in rapid quality deterioration and food waste. Metal‐organic frameworks (MOFs), a class of crystalline coordination materials with tunable porosity, high surface area, and diverse metal‐ligand architectures ...
Abhishek Bisht, Gokulprasanth Murugan, Jun Tae Kim, Soottawat Benjakul   +3 more
wiley   +1 more source

Positron annihilation lifetime spectroscopy source correction determination:A simulation study

, 2016
Positron annihilation lifetime spectroscopy (PALS) can provide sensitive detection and identification of vacancy-related point defects in materials. These measurements are normally performed using a positron source supported, and enclosed by, a thin foil.
Kanda, Gurmeet S., Keeble, David J.
core   +1 more source

Porosimetry of Zeolitic Imidazolate Frameworks Using Positron Annihilation Lifetime Spectroscopy

Social Science Research Network, 2023
Sandeep Kumar Sharma, J. Mor, P. Utpalla, J. Bahadur, D. Sen   +4 more
semanticscholar   +1 more source

Positron Lifetime Measurements of Vacancy Defects in Complex Oxides [PDF]

, 2014
Native defects in complex oxides play a crucial role in determining their optical, electrical, and magnetic properties and it is difficult to identify and characterize them. Positron lifetime spectroscopy is a powerful technique to study vacancy defects;
Selim, F., Varney, C.
core   +1 more source

Novel System for Potential Nondestructive Material Inspection Using Positron Annihilation Lifetime Spectroscopy

, 2011
A new positron annihilation lifetime spectrometer consisting of a start γ-ray detector, a stop γ-ray detector, a digital oscilloscope, and a positron detector, which is a plastic scintillator coupled to a photomultiplier tube, is described.
Yoshinori Kobayashi, Yoshihiro Watanabe, Masato Yamawaki, Kanehisa Hattori   +3 more
core   +1 more source