Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Tomasz Goworek"'
Autor:
Tomasz Goworek, Bożena Zgardzińska
Publikováno v:
Chemical Physics. 458:62-67
Binary mixtures of even-numbered normal alkanes C n H 2 n +2 and C n +2 H 2 n +6 with n ⩽ 18 were investigated by positron annihilation spectroscopy. Formation of the rotator phase was observed in mixed structures, while no such a phase in neat alk
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0110f766d44fdb932a5af529bfabc198
https://doi.org/10.1016/j.chemphys.2015.06.002
https://doi.org/10.1016/j.chemphys.2015.06.002
Publikováno v:
Chemical Physics Letters. 658:80-82
Positron lifetime spectra were measured in solid and liquid phases of 2-norbornylene. No accumulation of excess electrons in the brittle phase was observed. The vacancy activation enthalpy in plastic phase was found equal (0.13 ± 0.02) eV. The tempe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66954b1c91d6a206aa8be58a5a804b4c
https://doi.org/10.1016/j.cplett.2016.06.015
https://doi.org/10.1016/j.cplett.2016.06.015
Autor:
Tomasz Goworek
Publikováno v:
Annales UMCS, Chemia. 69:1-110
Positronium (a hydrogen-like bound state of an electron and a positron) is a convenient probe to determine the sizes of subnanometric free volumes (voids) in condensed matter. A review of experimental methods used in positron spectroscopy and example
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a8f3d7b2328d6106c37a0e98104bf25
https://doi.org/10.2478/umcschem-2013-0012
https://doi.org/10.2478/umcschem-2013-0012
Autor:
Bożena Zgardzińska, Tomasz Goworek
Publikováno v:
Chemical Physics. 421:10-14
The ortho-positronium ( o -Ps) lifetime and intensity in cyclohexane was measured as a function of temperature at various wavelengths of illuminating light. Accommodation of excess electrons in traps was observed in whole range of rigid crystalline p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53b20ff3b96ed39dbe88722b234991ad
https://doi.org/10.1016/j.chemphys.2013.05.011
https://doi.org/10.1016/j.chemphys.2013.05.011
Autor:
Bożena Zgardzińska, Tomasz Goworek
Publikováno v:
Chemical Physics. 411:1-5
Positron annihilation lifetime spectra were measured in n -alkanes. From the lifetime of ortho -positronium ( o -Ps) one can determine the surface tension and Tolman’s length for the cavity produced by positronium in the liquid. This tension is fou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa1a13fda4207b838cdf442a5ddb5b14
https://doi.org/10.1016/j.chemphys.2012.12.004
https://doi.org/10.1016/j.chemphys.2012.12.004
Publikováno v:
Materials Science Forum. 733:67-74
A review of data about positron annihilation lifetime in normal alkanes is presented. It was found that positronium in rigid phase locates in the interlamellar gap, while in the rotator one in free volumes inside lamellae. Interesting effects seem to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9177df1e5f98a19690e058ddc7b52ed
https://doi.org/10.4028/www.scientific.net/msf.733.67
https://doi.org/10.4028/www.scientific.net/msf.733.67
Autor:
Bożena Zgardzińska, Tomasz Goworek
Publikováno v:
Chemical Physics. 405:32-39
Ortho -positronium ( o -Ps) lifetime in alkanes and alcohols was measured in a broad range of temperatures and the results were compared with calculations in the framework of a standard bubble model. The lifetimes as a function of temperature above t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e54babb23a2b404944fad6d2ce3eda6b
https://doi.org/10.1016/j.chemphys.2012.06.005
https://doi.org/10.1016/j.chemphys.2012.06.005
Autor:
Bożena Zgardzińska, Tomasz Goworek
Publikováno v:
Acta Physica Polonica A. 119:328-331
190 Kthesaturationvalueofpositroniumintensitychangeswithtemperaturemainlyduetothechangeofpositronmobility. Withtheincreaseoftheirradiationdosetheprocessofchargingtraps is slowing down and this effect is ruled mainly by interaction of excess electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1df18740c56f1e4eddd280201716f24f
https://doi.org/10.12693/aphyspola.119.328
https://doi.org/10.12693/aphyspola.119.328
Publikováno v:
Chemical Physics. 379:116-122
Positron annihilation lifetime spectra (PALS) in binary mixture of alkanes were measured as a function of pressure. It was found that after rapid transition from rotator to rigid phase the intensity of positronium formation is not stable in time; its
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66ec67608ba29328775916c8778d9b5f
https://doi.org/10.1016/j.chemphys.2010.12.001
https://doi.org/10.1016/j.chemphys.2010.12.001
Autor:
Tomasz Goworek
Publikováno v:
Acta Physica Polonica A. 125:685-687
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c24f7917882b1a6b508b74a0dac754a
https://doi.org/10.12693/aphyspola.125.685
https://doi.org/10.12693/aphyspola.125.685