Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Geppert, Christopher"'
Autor:
Hannen, Volker, Vollbrecht, Jonas, Andelkovic, Zoran, Brandau, Carsten, Dax, Andreas, Geithner, Wolfgang, Geppert, Christopher, Gorges, Christian, Hammen, Michael, Kaufmann, Simon, König, Kristian, Litvinov, Yuri A., Lochmann, Matthias, Maaß, Bernhard, Meisner, Johann, Murböck, Tobias, Sánchez, Rodolfo, Schmidt, Matthias, Schmidt, Stefan, Steck, Markus, Stöhlker, Thomas, Thompson, Richard C., Trageser, Christian, Ullmann, Johannes, Weinheimer, Christian, Nörtershäuser, Wilfried
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 52 (2019) 085003
The LIBELLE experiment performed at the experimental storage ring (ESR) at the GSI Helmholtz Center for Heavy Ion Research in Darmstadt, Germany, has successfully determined the ground state hyperfine (HFS) splittings in hydrogen-like ($^{209}\rm{Bi}
Externí odkaz:
http://arxiv.org/abs/1812.05983
Autor:
Skripnikov, Leonid V., Schmidt, Stefan, Ullmann, Johannes, Geppert, Christopher, Kraus, Florian, Kresse, Benjamin, Nörtershäuser, Wilfried, Privalov, Alexei F., Scheibe, Benjamin, Shabaev, Vladimir M., Vogel, Michael, Volotka, Andrey V.
Publikováno v:
Phys. Rev. Lett., 120, 093001 (2018)
A recent measurement of the hyperfine splitting in the ground state of Li-like $^{209}$Bi$^{80+}$ has established a "hyperfine puzzle" -- the experimental result exhibits a 7$\sigma$ deviation from the theoretical prediction [J. Ullmann et al., Nat.
Externí odkaz:
http://arxiv.org/abs/1803.02584
Autor:
Kahlenberg, Jan, Ries, Dieter, Ross, Kim Ulrike, Siemensen, Christian, Beck, Marcus, Geppert, Christopher, Heil, Werner, Hild, Nicolas, Karch, Jan, Karpuk, Sergei, Kories, Fabian, Kretschmer, Matthias, Lauss, Bernhard, Reich, Tobias, Sobolev, Yuri, Trautmann, Norbert
The performance of the upgraded solid deuterium ultracold neutron source at the pulsed reactor TRIGA Mainz is described. The current configuration stage comprises the installation of a He liquefier to run UCN experiments over long-term periods, the u
Externí odkaz:
http://arxiv.org/abs/1706.07795
Autor:
Frömmgen, Nadja, Balabanski, Dimiter L., Bissell, Mark L., Bieroń, Jacek, Blaum, Klaus, Cheal, Bradley, Flanagan, Kieran, Fritzsche, Stephan, Geppert, Christopher, Hammen, Michael, Kowalska, Magdalena, Kreim, Kim, Krieger, Andreas, Neugart, Rainer, Neyens, Gerda, Rajabali, Mustafa M., Nörtershäuser, Wilfried, Papuga, Jasna, Yordanov, Deyan T.
Publikováno v:
Eur. Phys. J. D 69, 164 (2015)
Hyperfine structure $A$ and $B$ factors of the atomic $5s\,5p\,\; ^3\rm{P}_2 \rightarrow 5s\,6s\,\; ^3\rm{S}_1$ transition are determined from collinear laser spectroscopy data of $^{107-123}$Cd and $^{111m-123m}$Cd. Nuclear magnetic moments and elec
Externí odkaz:
http://arxiv.org/abs/1507.03846
Precision Test of Many-Body QED in the Be$^+$ $2p$ Fine Structure Doublet Using Short-Lived Isotopes
Autor:
Nörtershäuser, Wilfried, Geppert, Christopher, Krieger, Andreas, Pachucki, Krzysztof, Puchalski, Mariusz, Blaum, Klaus, Bissell, Mark L., Frömmgen, Nadja, Hammen, Michael, Kowalska, Magdalena, Krämer, Jörg, Kreim, Kim, Neugart, Rainer, Neyens, Gerda, Sánchez, Rodolfo, Yordanov, Deyan T.
Publikováno v:
Phys. Rev. Lett. 115, 033002 (2015)
Absolute transition frequencies of the $2s\; ^2{\rm S}_{1/2} \rightarrow 2p\;^2\mathrm{P}_{1/2,3/2}$ transitions in Be$^+$ were measured for the isotopes $^{7,9-12}$Be. The fine structure splitting of the $2p$ state and its isotope dependence are ext
Externí odkaz:
http://arxiv.org/abs/1507.03830
Autor:
Botermann, Benjamin, Bing, Dennis, Geppert, Christopher, Gwinner, Gerald, Hänsch, Theodor W., Huber, Gerhard, Karpuk, Sergei, Krieger, Andreas, Kühl, Thomas, Nörtershäuser, Wilfried, Novotny, Christian, Reinhardt, Sascha, Sánchez, Rodolfo, Schwalm, Dirk, Stöhlker, Thomas, Wolf, Andreas, Saathoff, Guido
Publikováno v:
Phys. Rev. Lett. 113, 120405 - Published 16 September 2014
We present the concluding result from an Ives-Stilwell-type time dilation experiment using 7Li+ ions confined at a velocity of beta = v/c = 0.338 in the storage ring ESR at Darmstadt. A Lambda-type three-level system within the hyperfine structure of
Externí odkaz:
http://arxiv.org/abs/1409.7951
Akademický článek
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Autor:
Lochmann, Matthias, Jöhren, Raphael, Geppert, Christopher, Andelkovic, Zoran, Anielski, Denis, Botermann, Benjamin, Bussmann, Michael, Dax, Andreas, Frömmgen, Nadja, Hammen, Michael, Hannen, Volker, Kühl, Thomas, Litvinov, Yuri A., López-Coto, Rubén, Stöhlker, Thomas, Thompson, Richard C., Vollbrecht, Jonas, Volotka, Andrey, Weinheimer, Christian, Wen, Weiqiang, Will, Elisa, Winters, Danyal, Sánchez, Rodolfo, Nörtershäuser, Wilfried
Publikováno v:
Physical Review A 90, 030501(R) (2014)
We performed a laser spectroscopic determination of the $2s$ hyperfine splitting (HFS) of Li-like $^{209}\text{Bi}^{80+}$ and repeated the measurement of the $1s$ HFS of H-like $^{209}\text{Bi}^{82+}$. Both ion species were subsequently stored in the
Externí odkaz:
http://arxiv.org/abs/1401.8224
Autor:
Krieger, Andreas, Blaum, Klaus, Bissell, Mark L., Frömmgen, Nadja, Geppert, Christopher, Hammen, Michael, Kreim, Kim, Kowalska, Magdalena, Krämer, Jörg, Neff, Thomas, Neugart, Rainer, Neyens, Gerda, Nörtershäuser, Wilfried, Novotny, Christian, Sanchez, Rodolfo, Yordanov, Deyan T.
The nuclear charge radius of $^{12}$Be was precisely determined using the technique of collinear laser spectroscopy on the $2s_{1/2}\rightarrow 2p_{1/2, 3/2}$ transition in the Be$^{+}$ ion. The mean square charge radius increases from $^{10}$Be to $
Externí odkaz:
http://arxiv.org/abs/1202.4873
Autor:
Dellmann Sophia, Reifarth René, Weigand Mario, Eberhardt Klaus, Garg Ruchi, Geppert Christopher, Heftrich Tanja, Kurtulgil Deniz, Lederer-Woods Claudia
Publikováno v:
EPJ Web of Conferences, Vol 260, p 11035 (2022)
The determination of astrophysically relevant neutron-induced cross sections is particularly difficult when the involved isotopes are radioactive or the cross sections are very small. Activation experiments at reactors offer the possibility to overco
Externí odkaz:
https://doaj.org/article/7554a9b4b8424bb5851c4e530ff9bf16
