A5063371556- Atomic and Molecular Physics
- Nuclear physics research studies
- Laser-Matter Interactions and Applications
- Advanced Frequency and Time Standards
- Mass Spectrometry Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Radioactive Decay and Measurement Techniques
- Laser-Plasma Interactions and Diagnostics
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Advanced Fiber Laser Technologies
- Particle physics theoretical and experimental studies
- History and Developments in Astronomy
- Crystallography and Radiation Phenomena
- Relativity and Gravitational Theory
- Astronomical and nuclear sciences
- Advanced X-ray Imaging Techniques
- Advanced NMR Techniques and Applications
- Advanced Chemical Physics Studies
- Radioactive element chemistry and processing
- Quantum optics and atomic interactions
- History and advancements in chemistry
- Laser-induced spectroscopy and plasma
- Particle accelerators and beam dynamics
Max Planck Institute for Nuclear Physics
2020-2025
In this Letter, we present mass-ratio measurements on highly charged <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>Yb</a:mi></a:mrow><a:mrow><a:mn>42</a:mn><a:mo>+</a:mo></a:mrow></a:msup></a:mrow></a:math> ions with a precision of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>4</c:mn><c:mo>×</c:mo><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>12</c:mn></c:mrow></c:msup></c:math> and isotope-shift...
Inner-shell electrons naturally sense the electric field close to nucleus, which can reach extreme values beyond 1015 V cm-1 for innermost electrons1. Especially in few-electron, highly charged ions, interaction with electromagnetic fields be accurately calculated within quantum electrodynamics (QED), rendering these ions good candidates test validity of QED strong fields. Consequently, their Lamb shifts were intensively studied past several decades2,3. Another approach is measurement...
Abstract Highly charged ions (HCIs) are less sensitive to external perturbations and therefore attractive for the development of ultrastable clocks. However, only a few HCI candidates known provide optical clock transitions. In this work, we discover large family clocks, with more than 100 suitable transitions hidden in fine-structure terms open-shell over 70 elements. Their projected instabilities accuracies $${\sigma }_{\tau } \sim 1{0}^{-17}/\sqrt{\tau }$$ <mml:math...
The cyclotron frequency ratio of ${^{187}\mathrm{Os}}^{29+}$ to ${^{187}\mathrm{Re}}^{29+}$ ions was measured with the Penning-trap mass spectrometer PENTATRAP. achieved result $R=1.000\text{ }000\text{ }013\text{ }882(5)$ is date most precise such measurement performed on ions. Furthermore, total binding-energy difference 29 missing electrons in Re and Os calculated by relativistic multiconfiguration methods, yielding value $\mathrm{\ensuremath{\Delta}}E=53.5(10)\text{ }\text{...
The atomic mass of uranium-238 has been determined to be <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mn>238.050</a:mn><a:mspace width="0.16em"/><a:mn>787</a:mn><a:mspace width="0.16em"/><a:mn>618</a:mn><a:mo>(</a:mo><a:mn>15</a:mn><a:mo>)</a:mo></a:mrow></a:math> u, improving the literature uncertainty by two orders magnitude. It is obtained from a measurement ratio <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"><d:mmultiscripts><d:mi...
<title>Abstract</title> Weak transitions between quantum states are of fundamental importance for a broad range phenomena from analytical biochemistry to precision physics, but generally challenge experimental detection. Due their small cross sections scaling with the absolute square transition matrix elements, spectroscopic measurements often fail in particular presence competing background processes. Here we introduce general concept break this law and enhance probability by exploiting...
The absolute atomic mass of $^{208}$Pb has been determined with a fractional uncertainty $7\times 10^{-11}$ by measuring the cyclotron-frequency ratio $R$ $^{208}$Pb$^{41+}$ to $^{132}$Xe$^{26+}$ high-precision Penning-trap spectrometer Pentatrap and computing binding energies $E_{\text{Pb}}$ $E_{\text{Xe}}$ missing 41 26 electrons, respectively, ab initio fully relativistic multi-configuration Dirac-Hartree-Fock (MCDHF) method. measured relative precision $9\times 10^{-12}$. have computed...
Highly charged ions (HCIs) offer many opportunities for next-generation clock research due to the vast landscape of available electronic transitions in different charge states. The development extreme ultraviolet frequency combs has enabled search based on shorter wavelengths HCIs. However, without initial knowledge energy states, these narrow are difficult be probed by lasers. In this Letter, we provide experimental observation and theoretical calculation a long-lived state Nb-like Pb^{41+}...
A scheme to infer the temporal coherence of EUV frequency combs generated from intracavity high-order harmonic generation is put forward. The excitation dynamics highly charged Mg-like ions, which interact with pulse trains featuring different carrier-envelope-phase fluctuations, are simulated. While demonstrating microscopic origin macroscopic equivalence between excitations induced by and continuous-wave lasers, we show that time train can be determined spectrum excitations. will provide a...
Abstract A scheme is put forward to generate fully coherent x-ray lasers based on population inversion in highly charged ions, created by fast inner-shell photoionization using broadband free-electron-laser (XFEL) pulses a laser-produced plasma. Numerical simulations the Maxwell–Bloch theory show that one can obtain high-intensity, femtosecond of relative bandwidths Δ ω / = 10 −5 –10 −7 , orders magnitude narrower than for discrete wavelengths down sub-ångström regime. Such be applicable...
We have used the Cryogenic Storage Ring (CSR) at Max Planck Institute for Nuclear Physics to study long-lived metastable states of silicon anion. A ${\mathrm{Si}}^{\ensuremath{-}}$ beam 58 keV kinetic energy was stored in ultrahigh cryogenic vacuum CSR, employing only electrostatic deflection elements. laser systems various wavelengths infer information on decay anionic by selective photodetachment. Our results give evidence an excited state which we determine extremely long lower lifetime...
The Standard Model of particle physics describes the properties elementary particles and their interactions remarkably well, but in particular does not account for dark matter. Isotope-shift spectroscopy is a sensitive probe fifth forces new that illuminate matter sector. This method sets bounds on bosons couple neutrons electrons with masses keV/c2 to MeV/c2 range. With increasing spectroscopic precision, such searches are limited by uncertainties isotope understanding nuclear structure....
Nonlinearities in King plots (KP) of isotope shifts (IS) can reveal the existence beyond-Standard-Model (BSM) interactions that couple electrons and neutrons. However, it is crucial to distinguish higher-order Standard Model (SM) effects from BSM physics. We measure IS transitions ${{}^{3}P_{0}~\rightarrow~{}^{3}P_{1}}$ $\mathrm{Ca}^{14+}$ ${{}^{2}S_{1/2} \rightarrow {}^{2}D_{5/2}}$ $\mathrm{Ca}^{+}$ with sub-Hz precision as well nuclear mass ratios relative uncertainties below...
The extreme forces of highly charged ions and their trapping within high-precision experimental devices allow for challenging fundamental theories in yet unexplored territory. Here we focus on the theoretical side employing ab initio fully relativistic multiconfiguration Dirac–Hartree–Fock (MCDHF) configuration interaction (RCI) methods to precisely calculate bound-state energies complex atoms ions, as well presenting state-of-the-art g-factor calculations. In combination with similarly...
The generation of narrow-band fully coherent x-ray lasers based on stimulated emission in highly charged ions is investigated. lasing scheme we put forward leads to sources with high spatial and temporal coherence, enabling new applications quantum optics. Highly can be generated plasmas created by line-focused intense optical lasers. Population inversion between the 1s2l (l = s, p) 1s^2 states He-like obtained inner-shell photoionization Li-like free-electron laser pulses. We show that...
Since the advent of x-ray free-electron lasers (XFELs), considerable efforts have been devoted to achieve pulses with better temporal coherence. Here, we put forward a scheme generate fully coherent (XRLs) based on population inversion in highly charged ions (HCIs), created by fast inner-shell photoionization using XFEL laser-produced plasma. Numerical simulations show that one can obtain high-intensity, femtosecond relative bandwidths $Δω/ω=10^{-5}$ - $10^{-7}$ orders magnitude narrower...
Highly charged ions (HCIs) are insensitive to external perturbations and attractive for the development of ultrastable clocks. However, only a few HCI candidates known provide optical clock transitions. In this Letter, we show that, as result strong relativistic effects, there more than 100 suitable in 70 elements. Their transitions embedded fine-structure splitting $nd^4$, $nd^5$ $nd^6$ ground-state configurations with $n=3,4,5$ being principal quantum numbers. The corresponding high...
Inner-shell electrons naturally sense the electric field close to nucleus, which can reach extreme values beyond $10^{15}\,\text{V}/\text{cm}$ for innermost electrons. Especially in few-electron highly charged ions, interaction with electromagnetic fields be accurately calculated within quantum electrodynamics (QED), rendering these ions good candidates test validity of QED strong fields. Consequently, their Lamb shifts were intensively studied last decades. Another approach is measurement...
Highly charged ions (HCIs) offer many opportunities for next-generation clock research due to the vast landscape of available electronic transitions in different charge states. The development XUV frequency combs has enabled search based on shorter wavelengths HCIs. However, without initial knowledge energy states, these narrow are difficult be probed by lasers. In this Letter, we provide experimental observation and theoretical calculation a long-lived state Nb-like Pb$^{41+}$ which could...
The atomic mass of uranium-238 has been determined to be $238.050\,787\,618(15)\,\text{u}$, improving the literature uncertainty by two orders magnitude. It is obtained from a measurement ratio $^{238}$U$^{47+}$ and $^{132}$Xe$^{26+}$ ions with an $3.5\times 10^{-12}$. was carried out Penning-trap spectrometer \textsc{Pentatrap} accompanied calculation binding energies $E_{\text{U}}$ $E_{\text{Xe}}$ 47 26 missing electrons highly charged ions, respectively. These were using \textit{ab...
The extreme ultraviolet (EUV) pulse trains produced via intracavity high-harmonic generation of infrared suffer from amplified pulse-to-pulse phase fluctuations. One can detect such fluctuations resonant EUV excitations highly charged ions.