K. Chrysalidis
A5090473436- Atomic and Molecular Physics
- Nuclear physics research studies
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Astronomical and nuclear sciences
- Laser-Matter Interactions and Applications
- Atomic and Subatomic Physics Research
- Radioactive Decay and Measurement Techniques
- Advanced Frequency and Time Standards
- Radioactive element chemistry and processing
- Laser Design and Applications
- Quantum Chromodynamics and Particle Interactions
- Radiation Therapy and Dosimetry
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-induced spectroscopy and plasma
- Particle accelerators and beam dynamics
- Inorganic Fluorides and Related Compounds
- Radioactive contamination and transfer
- Quantum, superfluid, helium dynamics
- Spectroscopy and Laser Applications
- Boron Compounds in Chemistry
European Organization for Nuclear Research
2017-2025
University of Warsaw
2024
National Centre for Nuclear Research
2024
Johannes Gutenberg University Mainz
2016-2023
Macquarie University
2021-2022
University of Strathclyde
2022
National Technical University of Athens
2022
Gobierno de Navarra
2022
Universidad de Navarra
2022
Abstract Highly accurate and precise electronic structure calculations of heavy radioactive atoms their molecules are important for several research areas, including chemical, nuclear, particle physics. Ab initio quantum chemistry can elucidate structural details in these systems that emerge from the interplay relativistic electron correlation effects, but large number electrons complicates calculations, scarcity experiments prevents insightful theory-experiment comparisons. Here we report...
At ISOLDE the majority of radioactive ion beams are produced using resonance ionization laser source (RILIS). This is based on resonant excitation atomic transitions by wavelength tunable radiation. Since its installation at facility in 1994, RILIS setup has been developed into a versatile remotely operated system comprising state-of–the-art solid state and dye lasers capable generating multiple high quality any range 210–950 nm. A continuous programme scheme development CERN other...
Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond Standard Model. Precision measurements kinematics weak interactions, 3H β-decay 163Ho electron capture (EC), represent only model independent approach to determine absolute scale neutrino masses. The experiment, ECHo, is designed reach sub-eV sensitivity on mass by means analysis calorimetrically measured spectrum nuclide 163Ho. maximum energy available for this decay,...
Abstract Molecular spectroscopy offers opportunities for the exploration of fundamental laws nature and search new particle physics beyond standard model 1–4 . Radioactive molecules—in which one or more atoms possesses a radioactive nucleus—can contain heavy deformed nuclei, offering high sensitivity investigating parity- time-reversal-violation effects 5,6 Radium monofluoride, RaF, is particular interest because it predicted to have an electronic structure appropriate laser cooling 6 , thus...
Abstract One of the most important properties influencing chemical behavior an element is electron affinity (EA). Among remaining elements with unknown EA astatine, where one its isotopes, 211 At, remarkably well suited for targeted radionuclide therapy cancer. With At − anion being involved in many aspects current astatine labeling protocols, knowledge this prime importance. Here we report measured value to be 2.41578(7) eV. This result compared state-of-the-art relativistic quantum...
Mass measurements with the ISOLTRAP mass spectrometer at CERN-ISOLDE improve uncertainties of neutron-deficient tin isotopes towards doubly magic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Sn</a:mi><a:mprescripts/><a:none/><a:mn>100</a:mn></a:mmultiscripts></a:math>. The uncertainty <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Sn</b:mi><b:mprescripts/><b:none/><b:mn>103</b:mn></b:mmultiscripts></b:math> was reduced by a factor...
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Th</a:mi><a:mprescripts/><a:none/><a:mrow><a:mn>229</a:mn><a:mi>m</a:mi></a:mrow></a:mmultiscripts></a:math> nuclear clock isomer embedded in different host materials is reported. The ratio number photons and <b:math...
Abstract The tin isotope 100 Sn is of singular interest for nuclear structure due to its closed-shell proton and neutron configurations. It also the heaviest nucleus comprising protons neutrons in equal numbers—a feature that enhances contribution short-range proton–neutron pairing interaction strongly influences decay via weak interaction. Decay studies region have attempted prove doubly magic character 1 but few studied it from an ab initio theoretical perspective 2,3 , none these has...
Isotope shifts of $^{223-226,228}$Ra$^{19}$F were measured for different vibrational levels in the electronic transition $A^{2}{}{\Pi}_{1/2}\leftarrow X^{2}{}{\Sigma}^{+}$. The observed isotope demonstrate particularly high sensitivity radium monofluoride to nuclear size effects, offering a stringent test models describing density within nucleus. Ab initio quantum chemical calculations are excellent agreement with experimental observations. These results highlight some unique opportunities...
The neutron-rich isotopes $^{58-63}$Cr were produced for the first time at ISOLDE facility and their masses measured with ISOLTRAP spectrometer. new values are up to 300 times more precise than those in literature indicate significantly different nuclear structure from mass-surface trend. A gradual onset of deformation is found this proton neutron mid-shell region, which a gateway second island inversion around \emph{N}=40. In addition comparisons density-functional theory large-scale...
Abstract Understanding the evolution of nuclear charge radius is one long-standing challenges for theory. Recently, density functional theory calculations utilizing Fayans functionals have successfully reproduced radii a variety exotic isotopes. However, difficulties in isotope production hindered testing these models immediate region chart below heaviest self-conjugate doubly-magic nucleus 100 Sn, where near-equal number protons ( Z ) and neutrons N lead to enhanced neutron-proton pairing....
Fourier-limited nanosecond pulses featuring narrow spectral bandwidths are required for applications in spectroscopy, sensing, and quantum optics. Here, we demonstrate a direct simple route the generation of single-frequency light relying on phonon-resonant Raman interactions within monolithic diamond resonator. The technique enables production nearly optical (15 ns), with an overall bandwidth down to 180 MHz, which is two orders magnitude narrower than pump laser linewidth used (12 GHz)....
The impact of nuclear deformation can been seen in the systematics charge radii, with radii generally expanding increasing deformation. In this Letter, we present a detailed analysis precise relationship between quadrupole and size. Our approach combines first measurements changes mean-square well-deformed palladium isotopes A=98 A=118 density functional calculations using Fayans functionals, specifically Fy(std) Fy(Δr,HFB), UNEDF2 functional. are extracted from collinear laser spectroscopy...
We report on the development, characterization, and first application of a specialized resonance ionization laser ion source for high-resolution spectroscopy applications below usual hot cavity Doppler broadening limitations, on-line experiments at CERN-ISOLDE. The new PI-LIST comprises perpendicular laser/atom beam interaction in radio-frequency quadrupole unit directly downstream atomizer cavity. A spectral linewidth 200–300 MHz is demonstrated, with potential to achieve 100 MHz. Compared...
The magnetic dipole moments (μ) of 209Tlg (N=128) and 207Tlm (N=126) have been measured for the first time using in-source laser resonance-ionization spectroscopy technique with Laser Ion Source Trap (LIST) at ISOLDE (CERN). application LIST suppresses usually overwhelming background isobaric francium isotopes allows access to heavy thallium A⩾207. self-consistent theory finite Fermi systems based on energy density functional by Fayans et al. well describes N dependence μ 1/2+ ground states,...
The SPES laser ion source has been tested at ISOLDE Offline 2, CERN. A two-step single resonance photo-ionization scheme used to ionize gallium atoms in the tantalum hot-cavity source. beam time structure, enhancement of yield, and ionization efficiency are investigated relation temperature load. From structures, it is inferred that a significant fraction extracted ions generated transfer line rather than just hot cavity. effect electrostatic axial field on movement inside discussed....
The excited structure of the single-hole nucleus <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Sn</a:mi><a:mprescripts/><a:none/><a:mn>131</a:mn></a:mmultiscripts></a:math> populated by <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:msup><b:mi>β</b:mi><b:mo>−</b:mo></b:msup></b:math> decay <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mmultiscripts><c:mi>In</c:mi><c:mprescripts/><c:none/><c:mn>131</c:mn></c:mmultiscripts></c:math> was...
A new approach to observe the radiative decay of $^{229}\mathrm{Th}$ nuclear isomer, and determine its energy lifetime, is presented. Situated at a uniquely low excitation energy, this state might be key ingredient for development clock or laser and, search time variations fundamental constants like fine structure constant. The isomer's $\ensuremath{\gamma}$ towards ground will studied with high-resolution vacuum ultraviolet (VUV) spectrometer after production by $\ensuremath{\beta}$...
We report on the generation and tuning of single-frequency laser light in a monolithic Fabry–Pérot diamond Raman resonator operating visible spectral range. The device was capable squeezing linewidth broad multi-mode nanosecond pump (Δνp= 7.2 ± 0.9 GHz at λp= 450 nm) to nearly Fourier-limited single axial mode Stokes pulse (ΔνS= 114 20 MHz λS= 479 nm). achieved by precise adjustment temperature, with measured frequency-temperature slope ∂ν0/∂T≈ −3 GHz/K, temperature dependence first-order...
The use of radioactive molecules for fundamental physics research is a developing interdisciplinary field limited dominantly by their scarce availability. In this work, molecular ion beams containing actinide nuclei extracted from uranium carbide targets are produced via the Isotope Separation On-Line technique at CERN-ISOLDE facility. Two methods beam production studied: extraction source, and formation ions mass-separated in gas-filled radio-frequency quadrupole trap. Ion currents U$^+$,...
The neutron-rich radium isotopes, $^{222\ensuremath{-}233}\mathrm{Ra}$, were measured with Collinear Resonance Ionization Spectroscopy (CRIS) at the ISOLDE facility, CERN. hyperfine structure of $7{s}^{2}\phantom{\rule{0.16em}{0ex}}^{1}S_{0}\ensuremath{\rightarrow}7s7p\phantom{\rule{0.16em}{0ex}}^{3}P_{1}$ transition was probed, allowing measurement magnetic moments, quadrupole and changes in mean-square charge radii. These results are compared to existing literature values, new moments...