Results 101 to 110 of about 1,771,729 (203)

Free-Volume Studies in Polycaprolactone/Poly(propylene oxide) Urethane/Urea Membranes by Positron Lifetime Spectroscopy [PDF]

, 2008
Positron annihilation lifetime spectroscopy was used to study the free volume parameters in polypropylene oxide-based tri-isocyanate terminated prepolymer/polycaprolactone diol bi-soft urethane/urea membranes (PU/PCL) with PCL content from 5 up to 25 wt%.
de Lima, A., Ferreira Marques, M., Queiroz, D., Norberta de Pinho, M., Major, P., Kajcsos, Zs., Gordo, P.   +6 more
core   +1 more source

Positron Annihilation Ratio Spectroscopy (PsARS) Applied to Positronium Formation Studies [PDF]

, 2010
A Positron Annihilation of Radiation Spectrometer (PsARS) was developed and characterized. PsARS spectroscopy as well as digital Positron Annihilation Lifetime Spectroscopy (PALS) was applied to measure positronium formation on gold nanoparticles ...
Slaughter, Robert C.
core   +1 more source

Investigation of the Ability to Detect Electrolyte Disorder Using PET with Positron Annihilation Lifetime Spectroscopy. [PDF]

J Phys Chem B, 2023
Zaleski R, Kotowicz O, Górska A, Zaleski K, Zgardzińska B.   +4 more
europepmc   +1 more source

Pore size determination by positron annihilation lifetime spectroscopy

Optica Applicata, 2003
Two Vycor glasses were investigated using PALS method. The model of pick-off annihilation in cylindrical free volume was applied to evaluate the pore radii. The o-Ps mean lifetime value in the pores changed from 6.5 to 40 ns in one glass, while from 13 to 51 ns in the other (softer) one.
Jasińska, Bożena, Dawidowicz, Andrzej L., Goworek, Tomasz, Wawryszczuk, Jan   +3 more
openaire   +1 more source

Comparison of the free volume sizes and shapes determined from crystallographic and PALS data

Nukleonika, 2015
Two different classes of molecular crystals were investigated. The first group was benzenediols, which are characterized by the same chemical composition but a different organization of their crystallographic structures; all of the compounds from this ...
Tydda Maciej, Jasińska Bożena
doaj   +1 more source

Lifetime positron annihilation spectroscopy and photo-inactivated bacteria

, 2009
3 ...
openaire   +2 more sources

Formation of Nanoscale Protrusions on Polymer Films after Atomic Oxygen Exposure: Observations with Positron Annihilation Lifetime Spectroscopy. [PDF]

Langmuir, 2023
Goto A, Michishio K, Oka T, Tagawa M, Yamashita S.   +4 more
europepmc   +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

Structures of Surfactant System Studied by Positron Annihilation Lifetime Spectroscopy [PDF]

, 1996
Surfactant system has many applications in industry. Many investigations have been carried out on surfactants using various methods such as small-angle neutron scattering (SANS), small-angle x-ray scattering(SAXS),conductivity freeze-fracture electron ...
Ibrahim, Rosdi
core   +1 more source

Laser Powder Bed Fusion of Molybdenum and Mo-0.1SiC Studied by Positron Annihilation Lifetime Spectroscopy and Electron Backscatter Diffraction Methods. [PDF]

Materials (Basel), 2023
Ellsworth NE, Machacek JR, Kemnitz RA, Eckley CC, Sexton BM, Gearhart JA, Burggraf LW.   +6 more
europepmc   +1 more source