Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Harman Z"'
Autor:
Morgner, J., Tu, B., König, C. M., Sailer, T., Heiße, F., Bekker, H., Sikora, B., Lyu, C., Yerokhin, V. A., Harman, Z., López-Urrutia, J. R. Crespo, Keitel, C. H., Sturm, S., Blaum, K.
Inner-shell electrons naturally sense the electric field close to the nucleus, which can reach extreme values beyond $10^{15}\,\text{V}/\text{cm}$ for the innermost electrons. Especially in few-electron highly charged ions, the interaction with the e
Externí odkaz:
http://arxiv.org/abs/2307.06613
Autor:
Schneider, A., Sikora, B., Dickopf, S., Müller, M., Oreshkina, N. S., Rischka, A., Valuev, I. A., Ulmer, S., Walz, J., Harman, Z., Keitel, C. H., Mooser, A., Blaum, K.
Helium-3 has nowadays become one of the most important candidates for studies in fundamental physics [1, 2, 3], nuclear and atomic structure [4, 5], magnetometry and metrology [6] as well as chemistry and medicine [7, 8]. In particular, $^3$He nuclea
Externí odkaz:
http://arxiv.org/abs/2206.05943
Autor:
Rischka, A., Cakir, H., Door, M., Filianin, P., Harman, Z., Huang, W. J., Indelicato, P., Keitel, C. H., Koenig, C. M., Kromer, K., Mueller, M., Novikov, Y. N., Schuessler, R. X., Schweiger, Ch., Eliseev, S., Blaum, K.
Publikováno v:
Phys. Rev. Lett. 124 (2020) 113001
First ever measurements of the ratios of free cyclotron frequencies of heavy highly charged ions with Z>50 with relative uncertainties close to 1e-11 are presented. Such accurate measurements have become realistic due to the construction of the novel
Externí odkaz:
http://arxiv.org/abs/2203.09184
Autor:
Filianin, P., Lyu, C., Door, M., Blaum, K., Huang, W. J., Haverkort, M., Indelicato, P., Keitel, C. H., Kromer, K., Lange, D., Novikov, Y. N., Rischka, A., Schüssler, R. X., Schweiger, Ch., Sturm, S., Ulmer, S., Harman, Z., Eliseev, S.
Publikováno v:
Phys. Rev. Lett. 127 (2021) 072502
The cyclotron frequency ratio of $^{187}\mathrm{Os}^{29+}$ to $^{187}\mathrm{Re}^{29+}$ ions was measured with the Penning-trap mass spectrometer PENTATRAP. The achieved result of $R=1.000\:000\:013\:882(5)$ is to date the most precise such measureme
Externí odkaz:
http://arxiv.org/abs/2108.07039
Publikováno v:
Phys. Rev. A 104, 022814 (2021)
We report calculations of QED corrections to the $g$ factor of Li-like ions induced by the exchange of two virtual photons between the electrons. The calculations are performed within QED theory to all orders in the nuclear binding strength parameter
Externí odkaz:
http://arxiv.org/abs/2106.08095
Autor:
Debierre, V., Sikora, B., Cakir, H., Oreshkina, N. S., Yerokhin, V. A., Keitel, C. H., Harman, Z.
Publikováno v:
Phys. Rev. A 103, 030802 (2021)
A critical set of two-loop QED corrections to the $g$ factor of hydrogenlike ions is calculated without expansion in the nuclear binding field. These corrections are due to the polarization of the external magnetic field by the quantum vacuum, which
Externí odkaz:
http://arxiv.org/abs/2007.12244
Autor:
Cakir, H., Oreshkina, N. S., Valuev, I. A., Debierre, V., Yerokhin, V. A., Keitel, C. H., Harman, Z.
A means to extract the fine-structure constant $\alpha$ from precision spectroscopic data on one-electron ions is presented. We show that in an appropriately weighted difference of the bound-electron $g$ factor and the ground state energy, nuclear st
Externí odkaz:
http://arxiv.org/abs/2006.14261
Publikováno v:
Phys. Rev. A 102, 022815 (2020)
We report an investigation of the self-energy screening effects for the $g$ factor of the ground state of Li-like ions. The leading screening contribution of the relative order $1/Z$ is calculated to all orders in the binding nuclear strength paramet
Externí odkaz:
http://arxiv.org/abs/2006.08284
Autor:
Cakir, H., Yerokhin, V. A., Oreshkina, N. S., Sikora, B., Tupitsyn, I. I., Keitel, C. H., Harman, Z.
QED corrections to the $g$ factor of Li-like and B-like ions in a wide range of nuclear charges are presented. Many-electron contributions as well as radiative effects on the one-loop level are calculated. Contributions resulting from the interelectr
Externí odkaz:
http://arxiv.org/abs/2004.06607
Autor:
Bekker, H., Borschevsky, A., Harman, Z., Keitel, C. H., Pfeifer, T., Schmidt, P. O., López-Urrutia, J. R. Crespo, Berengut, J. C.
Recent theoretical works have proposed atomic clocks based on narrow optical transitions in highly charged ions. The most interesting candidates for searches of new physics are those which occur at rare orbital crossings where the shell structure of
Externí odkaz:
http://arxiv.org/abs/1910.09010