Unexpectedly large difference of the electron density at the nucleus in the 4p²P1/2,3/2 fine-structure doublet of Ca ⁺

verfasst von: Chunyan Shi, Florian Gebert, Christian Gorges, Simon Kaufmann, Wilfried Nörtershäuser, Bijaya Kumar Sahoo, A. Surzhykov, Vladimir A. Yerokhin, Julian C. Berengut, Fabian Wolf, J. C. Heip, Piet Oliver Schmidt
Abstract: We measured the isotope shift in the ²S _{1 / 2}→ ²P _{3 / 2} (D2) transition in singly ionized calcium ions using photon recoil spectroscopy. The high accuracy of the technique enables us to compare the difference between the isotope shifts of this transition to the previously measured isotopic shifts of the ²S _{1 / 2}→ ²P _{1 / 2} (D1) line. This so-called splitting isotope shift is extracted and exhibits a clear signature of field shift contributions. From the data, we were able to extract the small difference of the field shift coefficient and mass shifts between the two transitions with high accuracy. This J-dependence is of relativistic origin and can be used to benchmark atomic structure calculations. As a first step, we use several ab initio atomic structure calculation methods to provide more accurate values for the field shift constants and their ratio. Remarkably, the high-accuracy value for the ratio of the field shift constants extracted from the experimental data is larger than all available theoretical predictions.
Organisationseinheit(en): Institut für Quantenoptik
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en): Physikalisch-Technische Bundesanstalt (PTB)
Technische Universität Darmstadt
Physical Research Laboratory India
Technische Universität Braunschweig
St. Petersburg State Polytechnical University
University of New South Wales (UNSW)
Typ: Artikel
Journal: Applied Physics B: Lasers and Optics
Band: 123
ISSN: 0946-2171
Publikationsdatum: 06.12.2016
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik und Astronomie (sonstige), Physik und Astronomie (insg.)
Elektronische Version(en): https://doi.org/10.1007/s00340-016-6572-z (Zugang: Unbekannt)

BibTeX

@article{966a83c4f3354eebad6b4ce1dffc85cb,
title = "Unexpectedly large difference of the electron density at the nucleus in the 4p2P1/2,3/2 fine-structure doublet of Ca +",
abstract = "We measured the isotope shift in the 2S 1 / 2→ 2P 3 / 2 (D2) transition in singly ionized calcium ions using photon recoil spectroscopy. The high accuracy of the technique enables us to compare the difference between the isotope shifts of this transition to the previously measured isotopic shifts of the 2S 1 / 2→ 2P 1 / 2 (D1) line. This so-called splitting isotope shift is extracted and exhibits a clear signature of field shift contributions. From the data, we were able to extract the small difference of the field shift coefficient and mass shifts between the two transitions with high accuracy. This J-dependence is of relativistic origin and can be used to benchmark atomic structure calculations. As a first step, we use several ab initio atomic structure calculation methods to provide more accurate values for the field shift constants and their ratio. Remarkably, the high-accuracy value for the ratio of the field shift constants extracted from the experimental data is larger than all available theoretical predictions.",
author = "Chunyan Shi and Florian Gebert and Christian Gorges and Simon Kaufmann and Wilfried N{\"o}rtersh{\"a}user and Sahoo, {Bijaya Kumar} and A. Surzhykov and Yerokhin, {Vladimir A.} and Berengut, {Julian C.} and Fabian Wolf and Heip, {J. C.} and Schmidt, {Piet Oliver}",
note = "Funding information: We acknowledge financial support from the German Federal Ministry for Education and Research (BMBF) under contract 05P15RDFN1, the Helmholtz International Center for FAIR (HIC for FAIR) within the LOEWE program by the State of Hesse, the State of Lower Saxony, Hannover, Germany and DFG through grants SCHM2678/3-1 and CRC 1227 DQ-mat, project B05. SK received support from HGS-Hire. BKS acknowledges use of the Vikram-100 HPC cluster at the Physical Research Laboratory, Ahmedabad for performing calculations. V.A.Y acknowledges support by the Russian Federation program for organizing and carrying out scientific investigations. WN thanks G.W.F. Drake, Z.C. Yan, and R. Neugart for stimulating discussions. PS and WN thank K. Pachucki for stimulating discussions.",
year = "2016",
month = dec,
day = "6",
doi = "10.1007/s00340-016-6572-z",
language = "English",
volume = "123",
journal = "Applied Physics B: Lasers and Optics",
issn = "0946-2171",
publisher = "Springer Verlag",
number = "1",
}

Unexpectedly large difference of the electron density at the nucleus in the 4p2P1/2,3/2 fine-structure doublet of Ca +

Unexpectedly large difference of the electron density at the nucleus in the 4p²P1/2,3/2 fine-structure doublet of Ca ⁺