Temat: ortho-positronium (o-Ps) - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: PALS investigation of resorcinol under high pressure
Autorzy:: Tydda, M.
Jasińska, B.
Pieniążek, A.
Powiązania:: https://bibliotekanauki.pl/articles/147999.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: free volume
ortho-positronium (o-Ps)
pressure
positron annihilation lifetime spectroscopy (PALS)
Opis:: Two kinds of measurements were conducted with resorcinol at high pressure : the first one with the use of a mechanical press and the second one with the use of a gaseous compressor. In the second case, due to some gas penetrating the material structure, the lifetime spectra obtained were difficult to analyze. The free volumes in resorcinol were influenced both by high pressure and the gas coming into the crystallographic structure.
Źródło:: Nukleonika; 2013, 58, 1; 195-198
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Porosity structure in photon active glasses
Autorzy:: Jasińska, B.
Śniegocka, M.
Reisfeld, R.
Zigansky, E.
Powiązania:: https://bibliotekanauki.pl/articles/147953.pdf
Data publikacji:: 2013
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: glass
ortho-positronium (o-Ps)
porosity
positron annihilation lifetime spectroscopy (PALS)
sol-gel technique
Opis:: Two kinds of photon active glasses were investigated using positron annihilation lifetime spectroscopy (PALS). Both kinds of glasses were prepared using a sol-gel technique, doped by complex of ruthenium tris bipyridyl chloride. Glasses differed from the initial matrix: the first one was prepared using silicon oxide while the second one - zircon oxide. The ortho-positronium (o-Ps) lifetime and intensities were determined from lifetime spectra. Different porosity structure concluded from PALS measurements was found in both cases. In the silica based glasses small free volumes (angstrom size) and pores (from 1 to 10 nm) existed in the material. On the contrary, in zirconia based glasses small intermolecular voids were produced in the structure only, independently of the way of material preparation.
Źródło:: Nukleonika; 2013, 58, 1; 241-244
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

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