Zobrazeno 1 - 10
of 78
pro vyhledávání: '"O. Steinsvoll"'
Autor:
O. Steinsvoll, Eugeniusz Grech, Andrzej Pawlukojć, Małgorzata Nowina Konopka, J. Nowicka-Scheibe, Grażyna Bator, Lucjan Sobczyk, Jerzy A. Janik, Jan Krawczyk
Publikováno v:
Collection of Czechoslovak Chemical Communications. 74:73-84
The quasi-elastic neutron scattering (QENS) spectra over the temperature range 10–270 K were studied. The activation energies for the stochastic jumps of methyl groups in neat tetramethylpyrazine (TMP) and in the complex TMP·TCNB (tetracyanobenzen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e7e82a6a6e7502a74bfb36d469da334
https://doi.org/10.1135/cccc2008057
https://doi.org/10.1135/cccc2008057
Autor:
J. Nowicka-Scheibe, M. Nowina Konopka, Grażyna Bator, Lucjan Sobczyk, I. V. Kalinin, O. Steinsvoll, Andrzej Pawlukojć, Ireneusz Natkaniec, Eugeniusz Grech, Jan Krawczyk
Publikováno v:
Phase Transitions. 80:489-500
The infrared and Raman spectra for durene, tetracyanobenzene and their 1 : 1 complex were studied. Simultaneously the neutron scattering experiments (INS and QENS) were performed. A detailed analysis of the modes assigned to the methyl groups vibrati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3031a0d5bbc12cba34f65118902eff0
https://doi.org/10.1080/01411590701339344
https://doi.org/10.1080/01411590701339344
Publikováno v:
Physica B: Condensed Matter. 371:249-256
The results of inelastic incoherent neutron-scattering measurements of solid phases of isopentyl cyanobiphenyl (5*CB), isooctyloxy cyanobiphenyl (8*OCB), cyclooctanol and glycerol are presented. Low-energy excitations in glassy phases were observed b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a06508e402f4c712b4244796c49845b
https://doi.org/10.1016/j.physb.2005.10.116
https://doi.org/10.1016/j.physb.2005.10.116
Autor:
M. Nowina Konopka, Pawlukojć, J. Mayer, Jan Krawczyk, J.A. Janik, O. Steinsvoll, Ireneusz Natkaniec
Publikováno v:
Physica B: Condensed Matter. 362:271-277
The Quasi-elastic Neutron scattering (QENS) spectra of polycrystalline hexamethylbenzene (HMB) were measured for temperatures from 10 K to room temperature (phase III and phase II) for momentum transfer 1.9 A −1 . The Inelastic Neutron scattering (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26ac3dea1c160d18ed715d9ab218cb80
https://doi.org/10.1016/j.physb.2005.02.023
https://doi.org/10.1016/j.physb.2005.02.023
Autor:
Jan Krawczyk, R. Jakubas, J. Mayer, Ireneusz Natkaniec, T. Stanek, O Steinsvoll, Wojciech Zając, J.A. Janik
Publikováno v:
Scopus-Elsevier
Rotation of (CH3NH3)+ cations in crystalline (CH3NH3)5Bi2Cl11, (CD3NH3)5Bi2Cl11 and (CH3NH3)5Bi2Br11 was studied by QNS. The model of instantaneous 120° jumps of whole cations around their C–N axes was fitted to the experimental data. The paramete
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f16e932924181c4f5e46e3d300a5f1b5
https://doi.org/10.1016/s0921-4526(99)00220-3
https://doi.org/10.1016/s0921-4526(99)00220-3
Publikováno v:
Physica B: Condensed Matter. 233:179-186
This paper presents a search for tunnel transitions of NH3 groups in hexammine compounds above the phase transition at which classical rotation, i.e. hoppings over barriers to rotation, start. The substances under study are [Co(NH3)6]I2, [Ni(NH3)6](N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1025205d7a409571a13644f361637524
https://doi.org/10.1016/s0921-4526(97)00298-6
https://doi.org/10.1016/s0921-4526(97)00298-6
Publikováno v:
Applied Physics A: Materials Science & Processing. 74:s439-s441
The low-energy excitations in crystalline and glassy triphenyl phosphite were studied by inelastic incoherent neutron scattering with two different instruments. The results – the incoherent dynamic structure factor S(2θ,ω) and the density of stat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::740c5190d7a4d56dd64c6f6270ca4d52
https://doi.org/10.1007/s003390201646
https://doi.org/10.1007/s003390201646
Autor:
Giovanni Consiglio, O. Steinsvoll, A. Kjekshus, Michel Chanon, Helmer Fjellvåg, Yoshito Okada, Ahmad Nasiri, P.H. Andresen, Cindy Striley, Johann Weidlein
Publikováno v:
Acta Chemica Scandinavica. 47:264-270
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1819c507e42ce0281358c99def3becd
https://doi.org/10.3891/acta.chem.scand.47-0264
https://doi.org/10.3891/acta.chem.scand.47-0264
Autor:
E. J. Samuelsen, T. Lægreid, Wu Ting, O. Steinsvoll, K. Fossheim, M. Slaski, Yoshikazu Hidaka, O.-M. Nes
Publikováno v:
Solid State Communications. 77:945-948
A single crystal of La 1.88 Sr 0.12 CuO 4 was studied by means of X-ray and neutron diffraction experiments and elastic measurements. The obtained data show that this compound undergoes a tetragonal to orthorhombic phase transition at around 260 K. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf9348c171bc7f3e3685eac933f986e1
https://doi.org/10.1016/0038-1098(91)90351-u
https://doi.org/10.1016/0038-1098(91)90351-u
Autor:
M. Prager, Halina Ptasiewicz-Bak, Håkan Rundlöf, Wanda Sawka-Dobrowolska, Jerzy A. Janik, Lucjan Sobczyk, Piotr Jagielski, Eugeniusz Grech, Andrzej Pawlukojć, Jan Krawczyk, Małgorzata Nowina-Konopka, J. Nowicka-Scheibe, O. Steinsvoll, Grażyna Bator
Publikováno v:
The Journal of chemical physics. 123(12)
The 1:1 hexamethylbenzene (HMB)-tetracyanoquinodimethane (TCNQ) complex shows a first-order phase transition at 230/218 K (heating/cooling) with no change of the space group. The neutron-diffraction studies reveal that this transition is related to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c28a767b412afed731ed62e888b06d25
https://pubmed.ncbi.nlm.nih.gov/16392480
https://pubmed.ncbi.nlm.nih.gov/16392480