Zobrazeno 1 - 10
of 1 386
pro vyhledávání: '"A. López Urrutia"'
Autor:
Wilzewski, A., Huber, L. I., Door, M., Richter, J., Mariotti, A., Spieß, L. J., Wehrheim, M., Chen, S., King, S. A., Micke, P., Filzinger, M., Steinel, M. R., Huntemann, N., Benkler, E., Schmidt, P. O., Flannery, J., Matt, R., Stadler, M., Oswald, R., Schmid, F., Kienzler, D., Home, J., Craik, D. P. L. Aude, Eliseev, S., Filianin, P., Herkenhoff, J., Kromer, K., Blaum, K., Yerokhin, V. A., Valuev, I. A., Oreshkina, N. S., Lyu, C., Banerjee, S., Keitel, C. H., Harman, Z., Berengut, J. C., Viatkina, A., Gilles, J., Surzhykov, A., Rosner, M. K., López-Urrutia, J. R. Crespo, Fuchs, E.
Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence of beyond-Standard-Model (BSM) interactions that couple electrons and neutrons. However, it is crucial to distinguish higher-order Standard Model (SM) effects from BSM
Externí odkaz:
http://arxiv.org/abs/2412.10277
Accurate lifetime measurements of excited states of highly charged ions (HCIs) are essential for advancing diagnostics in both laboratory and astrophysical plasmas, especially in the X-ray regime. The Hanle effect, which utilizes external magnetic fi
Externí odkaz:
http://arxiv.org/abs/2412.01509
Autor:
Togawa, Moto, Richter, Jan, Shah, Chintan, Botz, Marc, Nenninger, Joshua, Danisch, Jonas, Goes, Joschka, Kühn, Steffen, Amaro, Pedro, Mohamed, Awad, Amano, Yuki, Orlando, Stefano, Totani, Roberta, de Simone, Monica, Fritzsche, Stephan, Pfeifer, Thomas, Coreno, Marcello, Surzhykov, Andrey, López-Urrutia, José R. Crespo
By exciting a series of $1\mathrm{s}^{2}\, ^{1}\mathrm{S}_{0} \to 1\mathrm{s}n\mathrm{p}\, ^{1}\mathrm{P}_{1}$ transitions in helium-like nitrogen ions with linearly polarized monochromatic soft X-rays at the Elettra facility, we found a change in th
Externí odkaz:
http://arxiv.org/abs/2408.12227
Autor:
Togawa, Moto, Kühn, Steffen, Shah, Chintan, Zaystev, Vladimir A., Oreshkina, Natalia S., Buck, Jens, Bernitt, Sonja, Steinbrügge, René, Seltmann, Jörn, Hoesch, Moritz, Keitel, Christoph H., Pfeifer, Thomas, Leutenegger, Maurice A., López-Urrutia, José R. Crespo
The transition energies of the two $1s$-core-excited soft X-ray lines (dubbed q and r) from $1s^2 2s ^1S_{1/2}$ to the respective upper levels $1s(^{2}S)2s2p(^{3}P) ^{2}P_{3/2}$ and $^{2}P_{1/2}$ of Li-like oxygen, fluorine and neon were measured and
Externí odkaz:
http://arxiv.org/abs/2408.12219
There is a growing interest in high-precision spectroscopy and frequency metrology for fundamental studies using sympathetically cooled highly charged ions (HCIs) embedded in Coulomb crystals of laser-cooled ions. In order to understand how their str
Externí odkaz:
http://arxiv.org/abs/2408.05049
Autor:
Grilo, Filipe, Shah, Chintan, Marques, José, Santos, José Paulo, López-Urrutia, José R. Crespo, Amaro, Pedro
We measure the energy-differential cross sections for collisional excitation of the soft X-ray electric-dipole K$\alpha$ ($x+y+w$) emission from He-like oxygen (O VII), using an electron beam ion trap. Values near their excitation thresholds were ext
Externí odkaz:
http://arxiv.org/abs/2407.20857
Autor:
Porsev, S. G., Cheung, C., Safronova, M. S., Bekker, H., Rehbehn, N. -H., Lopez-Urrutia, J. R. Crespo, Brewer, S. M.
We propose In-like Pr10+ as a candidate for the development of a high-accuracy optical clock with high sensitivity to a time variation of the fine-structure constant, (\dot alpha}/alpha, as well as favorable experimental systematics. We calculate its
Externí odkaz:
http://arxiv.org/abs/2407.17610
Autor:
Chen, Shuying, Spieß, Lukas J., Wilzewski, Alexander, Wehrheim, Malte, Dietze, Kai, Vybornyi, Ivan, Hammerer, Klemens, López-Urrutia, José R. Crespo, Schmidt, Piet O.
Optical clocks represent the most precise experimental devices, finding application in fields spanning from frequency metrology to fundamental physics. Recently, the first highly charged ions (HCI) based optical clock was demonstrated using Ar$^{13+}
Externí odkaz:
http://arxiv.org/abs/2406.04015
Autor:
Shah, Chintan, Kühn, Steffen, Bernitt, Sonja, Steinbrügge, René, Togawa, Moto, Berger, Lukas, Buck, Jens, Hoesch, Moritz, Seltmann, Jörn, Kozlov, Mikhail G., Porsev, Sergey G., Gu, Ming Feng, Porter, F. Scott, Pfeifer, Thomas, Leutenegger, Maurice A., Cheung, Charles, Safronova, Marianna S., López-Urrutia, José R. Crespo
Publikováno v:
Physical Review A 109, 063108 (2024)
We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest $2p-3d$ transitions in neon-like Ni XIX ions, $[2p^6]_{J=0} \rightarrow [(2p^5)_{1/2}\,3d_{3/2}]_{J=1}$ and $[2p^6]_{
Externí odkaz:
http://arxiv.org/abs/2404.14589
Autor:
Grell, Gabriel J., Leutenegger, Maurice A., Amaro, Pedro, López-Urrutia, José R. Crespo, Shah, Chintan
We calculated cross sections for the dielectronic recombination (DR) satellite lines of Fe XVII and benchmarked our predictions with experimental cross sections of Fe XVII resonances that were mono-energetically excited in an electron beam ion trap.
Externí odkaz:
http://arxiv.org/abs/2402.08767