Zobrazeno 1 - 10
of 28
pro vyhledávání: '"N. Rehbein"'
Autor:
N. Rehbein, Michael Akbar, J. P. Schenk, Sabine Heiland, J. Mair-Walther, Christoph Stippich, Christian Herweh, Maria Blatow, Martina Wengenroth, Ernst Nennig
Publikováno v:
NeuroImage. 44:306-311
Chiari II-malformation is a complex congenital deformity of the brain which is frequently associated with hydrocephalus. Abnormalities of the corpus callosum are known to occur in the majority of patients. The objective of the present study was to st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d05b77df21cf7eed0619712ca1ef9c7c
https://doi.org/10.1016/j.neuroimage.2008.09.006
https://doi.org/10.1016/j.neuroimage.2008.09.006
Autor:
N. Rehbein, Adolf Giesen, Ernst M. Rasel, Albane Douillet, Hardo Stoehr, J. Friebe, J. Keupp, Wolfgang Ertmer, Tanja E. Mehlstäubler, J. Gao, Holger Wolff
Publikováno v:
Applied Physics B. 91:29-33
We have developed a Nd:YVO4 thin-disk laser at 914 nm with single-frequency operation and active frequency stabilization to a low-finesse reference cavity. The spectral density of laser frequency noise is analysed by means of noise measurements at th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b89fab965aeeae028b957c3bee165899
https://doi.org/10.1007/s00340-008-2954-1
https://doi.org/10.1007/s00340-008-2954-1
Publikováno v:
The European Physical Journal D. 36:289-294
We report on recent progress in our Ramsey-Borde interferometer with cold magnesium atoms at 457.2 nm. A resolution as high as ∆ν = 290 Hz was achieved, which corresponds to a quality factor of Q =2 .3 × 10 12 . An upper limit of 170 Hz for the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d0bc237fba4caf29129a0778f6a22b0
https://doi.org/10.1140/epjd/e2005-00302-7
https://doi.org/10.1140/epjd/e2005-00302-7
Publikováno v:
Journal of Optics B: Quantum and Semiclassical Optics. 5:S183-S189
Quench cooling is a promising technique to reach ultra-cold temperatures in alkaline-earth atoms by Doppler cooling on ultra-narrow transitions. The principles of quench cooling are derived from an effective two-level system with a linewidth adjustab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1389041af678b0ae6d9956596b3e6431
https://doi.org/10.1088/1464-4266/5/2/378
https://doi.org/10.1088/1464-4266/5/2/378
Publikováno v:
Magnetic resonance in medicine. 60(5)
The accuracy of fiber tracking on the basis of diffusion tensor magnetic resonance imaging (DTI) is affected by many parameters. To increase accuracy of the tracking algorithm, we introduce DTI with a fourth-order tensor. Tensor elements comprise inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65aa366f67c1e026d6e12ed82e7c80ff
https://pubmed.ncbi.nlm.nih.gov/18958858
https://pubmed.ncbi.nlm.nih.gov/18958858
Autor:
Harald Schnatz, Gesine Grosche, Christian Lisdat, Wolfgang Ertmer, Burghard Lipphardt, Tanja E. Mehlstäubler, J. Friebe, M. Riedmann, N. Rehbein, Ernst M. Rasel, A. Pape, Karsten Moldenhauer
Publikováno v:
Physical Review A. 78
We report on a frequency measurement of the $(3{s}^{2})^{1}S_{0}\ensuremath{\rightarrow}(3s3p)^{3}P_{1}$ clock transition of $^{24}\mathrm{Mg}$ on a thermal atomic beam. The intercombination transition has been referenced to a portable primary Cs fre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d80612a6e795bfe1f6931482ccec0ad
https://doi.org/10.1103/physreva.78.033830
https://doi.org/10.1103/physreva.78.033830
Autor:
J. Friebe, N. Rehbein, Karsten Moldenhauer, Ernst M. Rasel, Tanja E. Mehlstäubler, Wolfgang Ertmer, M. Riedmann
Publikováno v:
Physical Review A. 77
Temperatures below the Doppler limit of $1.9\phantom{\rule{0.3em}{0ex}}\mathrm{mK}$ have been observed in magnesium. The strong cooling transition was modified by a coherent two-color excitation exploiting the longer lifetime of an upper level. We de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::603bc92a1b9fc0e1167bab59e3375502
https://doi.org/10.1103/physreva.77.021402
https://doi.org/10.1103/physreva.77.021402
Autor:
Volker Michels, J. Keupp, Karsten Moldenhauer, V. G. Pal’chikov, Charlotte Froese Fischer, N. Rehbein, Ernst M. Rasel, Andrei Derevianko, A. Douillet, Tanja E. Mehlstäubler, Georgio Tachiev, Sergey G. Porsev, Wolfgang Ertmer
Publikováno v:
Physical Review A. 76
Doppler cooling on narrow transitions has become a crucial technique for preparing ultracold samples of alkaline-earth-metal and alkaline-earth-metal-like atoms. For lighter species, such as calcium and magnesium, this technique relies on artificial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f7cac22a3c228eb091eda6ed0e0bd6d
https://doi.org/10.1103/physreva.76.043406
https://doi.org/10.1103/physreva.76.043406
Autor:
J. Friebe, A. Voskrebenzev, A. Pape, Wolfgang Ertmer, Karsten Moldenhauer, N. Rehbein, Ernst M. Rasel, M. Riedmann, Tanja E. Mehlstäubler
Publikováno v:
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference.
Standard sub-Doppler cooling methods are not applicable in bosonic magnesium due to the non-degenerate ground state. However, the Doppler limit can be surpassed by coupling the excited state of the cooling transition to the level 1D2 and cooling via
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e7a15ee56db13f67fb0284367d644b7
https://doi.org/10.1109/cleoe-iqec.2007.4386728
https://doi.org/10.1109/cleoe-iqec.2007.4386728
Publikováno v:
RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 179
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e5e08516293a17b6095626477d6bf2e
https://doi.org/10.1055/s-2007-977362
https://doi.org/10.1055/s-2007-977362