Výsledky vyhledávání - "Kraemer, Joerg"

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Transition Frequencies and Hyperfine Structure in $^{113,115}$In$^+$: Application of a Liquid-Metal Ion Source for Collinear Laser Spectroscopy

Autor: König, Kristian, Krämer, Jörg, Imgram, Phillip, Maaß, Bernhard, Nörtershäuser, Wilfried, Ratajczyk, Tim

Publikováno v: Phys. Rev. A 102, 042802 (2020)

We demonstrate the first application of a liquid-metal ion source for collinear laser spectroscopy in proof-of-principle measurements on naturally abundant In$^+$. The superior beam quality, i.e., the actively stabilized current and energy of a beam

Externí odkaz: http://arxiv.org/abs/2007.03773

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A $4\pi$ Fluorescence Detection Region for Collinear Laser Spectroscopy

Autor: Maaß, Bernhard, König, Kristian, Krämer, Jörg, Miller, Andrew J., Minamisono, Kei, Nörtershäuser, Wilfried, Sommer, Felix

We report on a novel detection system for collinear laser spectroscopy which provides an almost $4\pi$ solid angle for fluorescence photon detection by employing curved surface mirrors. Additional parabolic angular filters offer passive stray light s

Externí odkaz: http://arxiv.org/abs/2007.02658

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Nuclear Charge Radii of $^{10,11}$B

Autor: Maaß, Bernhard, Hüther, Thomas, Krause, Jan, Krämer, Jörg, König, Kristian, Lovato, Alessandro, Müller, Peter, Puchalski, Mariusz, Pachucki, Krzysztof, Roth, Robert, Sánchez, Rodolfo, Sommer, Felix, Wiringa, R. B., Nörtershäuser, Wilfried

Publikováno v: Phys. Rev. Lett. 122, 182501 (2019)

The first determination of the nuclear charge radius by laser spectroscopy for a five-electron system is reported. This is achieved by combining high-accuracy ab initio mass-shift calculations and a high-resolution measurement of the isotope shift in

Externí odkaz: http://arxiv.org/abs/1901.06323

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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

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Nuclear Charge Radius of $^{12}$Be

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

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