Detection of the 5p – 4f orbital crossing and its optical clock transition in Pr9+

Autor: H. Bekker, A. Borschevsky, Z. Harman, C. H. Keitel, T. Pfeifer, P. O. Schmidt, J. R. Crespo López-Urrutia, J. C. Berengut

Publikováno v: Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)

Atomic clocks are based on the frequency of optical transitions and offer high precision. Here the authors demonstrate a configuration crossing in the highly charged ion praseodymium (Pr$${}^{9+}$$ 9+ ) and determine the frequency of a potential refe

Externí odkaz: https://doaj.org/article/e1180d5c7b074c9499662a05f9e83f73

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Sensitivity to New Physics of Isotope Shift Studies using the Coronal Lines of Highly Charged Calcium Ions

Autor: Ming Feng Gu, José R. Crespo López-Urrutia, Julian C. Berengut, P. Micke, H. Bekker, Michael Rosner, Robert A. Müller, Nils-Holger Rehbehn, Andrey Surzhykov, S. A. King, Piet O. Schmidt

Publikováno v: Physical Review A

Promising searches for new physics beyond the current Standard Model (SM) of particle physics are feasible through isotope-shift spectroscopy, which is sensitive to a hypothetical fifth force between the neutrons of the nucleus and the electrons of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f6b0af185b84cc4966db6fc0ed9b90f
http://arxiv.org/abs/2102.02309

Spectroscopic investigations of YAG-laser-driven microdroplet-tin plasma sources of extreme ultraviolet radiation for nanolithography

Autor: Zoi Bouza, Francesco Torretti, Alex Bayerle, M. J. Deuzeman, J. R. Crespo López-Urrutia, John Sheil, Ronnie Hoekstra, S. Rai, Randy Meijer, James Colgan, Muharrem Bayraktar, R. Schupp, Wim Ubachs, Amanda Neukirch, Dmitry Kurilovich, Stefan Witte, Bo Liu, A N Ryabtsev, Lucas Poirier, Oscar Versolato, Joris Scheers, Lars Behnke, H. Bekker

Publikováno v: Journal of Physics : Conference Series, 1412(19):192006, 1-1. IOP Publishing Ltd.
Versolato, O, Bayerle, A, Bayraktar, M, Behnke, L, Bekker, H, Bouza, Z, Colgan, J, Crespo López-Urrutia, J R, Deuzeman, M J, Hoekstra, R, Kurilovich, D, Liu, B, Meijer, R, Neukirch, A, Poirier, L, Rai, S, Ryabtsev, A, Scheers, J, Schupp, R, Sheil, J, Torretti, F, Ubachs, W & Witte, S 2020, ' Spectroscopic investigations of YAG-laser-driven microdroplet-tin plasma sources of extreme ultraviolet radiation for nanolithography ', Journal of Physics : Conference Series, vol. 1412, no. 19, 192006, pp. 1-1 . https://doi.org/10.1088/1742-6596/1412/19/192006
Journal of Physics: Conference Series: Plasmas & Particle acceleration, 1412(19)
ISSUE=31;TITLE=XXXIst International Conference on Photonic, Electronic, and Atomic Collisions 2019

Synopsis Highly charged tin ions are the sources of extreme ultraviolet (EUV) light at 13.5-nm wavelength in laser-produced transient plasmas for next-generation nanolithography. Generating this EUV light at the required power, reliability, and stabi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e956001d45df07270d8fa3564c9b180
https://research.vu.nl/en/publications/8f9f2979-35c0-4135-bd86-9053be94e3e3

Detection of metastable electronic states by Penning trap mass spectrometry

Autor: Menno Door, Paul Indelicato, Christoph H. Keitel, Charlotte König, Stefan Ulmer, M. Braß, R. X. Schüssler, Zoltán Harman, H. Bekker, K. Kromer, Sergey Eliseev, M. Müller, A. Rischka, Pavel Filianin, J. R. Crespo López-Urrutia, Christoph Schweiger, Halil Cakir, W.J. Huang, Klaus Blaum, Maurits W. Haverkort, Yuri N. Novikov, Sven Sturm

Publikováno v: Nature
Nature, Nature Publishing Group, 2020, 581 (7806), pp.42-46. ⟨10.1038/s41586-020-2221-0⟩

State-of-the-art optical clocks1 achieve precisions of 10−18 or better using ensembles of atoms in optical lattices2,3 or individual ions in radio-frequency traps4,5. Promising candidates for use in atomic clocks are highly charged ions6 (HCIs) and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e40d2f1bc0383b68a263b3bb75bf58f