Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Ch. Hübner"'
Publikováno v:
physica status solidi (b). 251:1764-1776
In this paper, we review the theory of spin switching for systems of different sizes, from a quantum mechanical master equation approach for small atomic clusters to the quasiclassical description of spin dynamics by a stochastic Landau–Lifshits–
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b172c5df23194fb048607c37674efea7
https://doi.org/10.1002/pssb.201350225
https://doi.org/10.1002/pssb.201350225
Publikováno v:
Measurement Science and Technology. 18:1118-1136
The measurement of moisture distribution in bentonite barriers in salt mines is absolutely essential in order to monitor fluid ingress and record data for long-term security analyses. The aim of this investigation was to apply a TDR measurement syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::372d5a3c70fa5e37b3266e0a979e4c43
https://doi.org/10.1088/0957-0233/18/4/021
https://doi.org/10.1088/0957-0233/18/4/021
Autor:
Ch. Hübner, D. Bamford, Günter Dlubek, Th. Lüpke, K. Petters, Mary J. Hill, J Stejny, M A Alam
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 40:65-81
High-quality positron lifetime measurements (70 million total counts) are reported for polyethylenes (PEs) of different crystallinities (Xc = 3–82%). The specific volumes of the crystalline and amorphous phases (Vc and Va, respectively) were estima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26cfcb0b2c925884e1f60ed1ff4f6401
https://doi.org/10.1002/polb.10072
https://doi.org/10.1002/polb.10072
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 37:2539-2543
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::def18fd470136e2c81c7dc45b35512b8
https://doi.org/10.1002/(sici)1099-0488(19990901)37:17<2539::aid-polb25>3.0.co
https://doi.org/10.1002/(sici)1099-0488(19990901)37:17<2539::aid-polb25>3.0.co
Publikováno v:
physica status solidi (a). 174:313-325
In previous studies we have investigated artefacts which appear in analysed parameters of positron lifetime spectra containing distributed o-Ps lifetimes. Recently, we discovered also that the disagreements between the experimental positronium lifeti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4ebb088d202274a728da83bcfa18fbc
https://doi.org/10.1002/(sici)1521-396x(199908)174:2<313::aid-pssa313>3.0.co
https://doi.org/10.1002/(sici)1521-396x(199908)174:2<313::aid-pssa313>3.0.co
Publikováno v:
physica status solidi (a). 172:303-315
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f1daae7392557460f609e2e5e881d87
https://doi.org/10.1002/(sici)1521-396x(199904)172:2<303::aid-pssa303>3.0.co
https://doi.org/10.1002/(sici)1521-396x(199904)172:2<303::aid-pssa303>3.0.co
Publikováno v:
Macromolecules. 32:2348-2355
Positron annihilation lifetime (PAL) spectroscopy was used to study the effect of water uptake on the free volume in 6 FDA-ODA polyimide (PI2566, DuPont R ). Ortho- positronium (o-Ps) lifetime (τ3) and intensity (I3) data were analyzed assuming a Ga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a45eee22243bd27972a5c23ea7cdf3e3
https://doi.org/10.1021/ma981381s
https://doi.org/10.1021/ma981381s
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 149:501-513
High quality positron lifetime spectra were taken for several amorphous polymers. The spectra were analysed using the routine MELT which assumes continuous lifetime distributions, as well as the discrete-term analysis routine LIFSPECFIT. Disagreement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcc43d93d147b061b648709f48b72969
https://doi.org/10.1016/s0168-583x(98)00972-0
https://doi.org/10.1016/s0168-583x(98)00972-0
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 142:191-202
High quality positron lifetime spectra (total count of 70 million) were taken for polycarbonate (PC) and polystyrene (PS Hoechst). The spectra were analysed employing the routines CONTIN and MELT which both assume continuous lifetime distributions, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::126bbb9ea9a108a4a3f1ca6c88752467
https://doi.org/10.1016/s0168-583x(98)00265-1
https://doi.org/10.1016/s0168-583x(98)00265-1
Autor:
N. Aksel, Ch. Hübner
Publikováno v:
Archive of Applied Mechanics. 66:231-241
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c22928878b7621b0e261bae6b51ed80
https://doi.org/10.1007/bf00787351
https://doi.org/10.1007/bf00787351