405 citations · 1.1k across the 22 of their papers we have counts for
22 papers
Exploring - and -decay-induced quenching of the Th nuclear-clock isomer in solid-state hosts
Y. Elskens, M. Athanasakis-Kaklamanakis, S. Arasada Pradeep +52
The radiative decay dynamics of an ensemble of Th nuclei embedded in CaF and MgF is investigated. The isomer is populated through decay of Ac…
Ab initio calculations of the electronic structure of Ac
Genevieve Geehan, Marten Luit Reitsma, Johan David Polet +3
Accurate spectroscopic investigations of the heaviest elements are inherently challenging, due to their short lifetimes and low production yields. Success of such measurements requ…
Radiative Decay of the Th Nuclear Clock Isomer in Different Host Materials
S. V. Pineda, P. Chhetri, S. Bara +42
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the Th nuclear clock isomer embedded in different host materials is…
Electronic State Chromatography of Lutetium Cations
Biswajit Jana, EunKang Kim, Aayush Arya +6
Relativistic effects strongly influence the electronic structures of the heaviest elements, thereby shaping their chemical and physical properties. Studying ion mobility within a n…
Laser Resonance Chromatography of Th in He: an ab initio investigation
Giorgio Visentin, Anastasia Borschevsky, Larry A. Viehland +2
We propose a laser resonance chromatography (LRC) experiment on Th, with the goal of detecting the ion's electronic ground F state and metastable $7…
Laser Resonance Chromatography: First Commissioning Results and Future Prospects
EunKang Kim, Biswajit Jana, Aayush Arya +6
We report first results obtained during the commissioning of the Laser Resonance Chromatography (LRC) apparatus, which is conceived to enable atomic structure investigations in the…
Transport property predictions for laser resonance chromatography on Rf (Z = 104)
Giorgio Visentin, Harry Ramanantoanina, Anastasia Borschevsky +5
We propose a theoretically designed laser resonance chromatography (LRC) experiment on Rf (Z = 104) drifting in He buffer gas. To this end, we first developed a four-level rate…
State-specific ion mobilities of Lr^+ (Z = 103) in helium
Harry Ramanantoanina, Anastasia Borschevsky, Michael Block +2
Ion mobilities of Lr^+ (Z = 103) and of its lighter chemical homolog Lu^+ (Z = 71) in helium were calculated for the ground state ^1S_0 and the lowest metastable state ^3D_1. To th…
Observation of the radiative decay of the nuclear clock isomer
Sandro Kraemer, Janni Moens, Michail Athanasakis-Kaklamanakis +32
The nucleus of the radioisotope thorium-229 (Th) features an isomer with an exceptionally low excitation energy that enables direct laser manipulation of nuclear states.…
Electronic structure of Rf^+ (Z = 104) from ab initio calculations
Harry Ramanantoanina, Anastasia Borschevsky, Michael Block +1
We report calculation of the energy spectrum and the spectroscopic properties of the superheavy element ion: Rf^+. We use the 4-component relativistic Dirac-Coulomb Hamiltonian and…
Recent progress in laser spectroscopy of the actinides
Michael Block, Mustapha Laatiaoui, Sebastian Raeder
The interest to perform laser spectroscopy in the heaviest elements arises from the strong impact of relativistic effects, electron correlations and quantum electrodynamics on thei…
Mobility of the Singly-Charged Lanthanide and Actinide Cations: Trends and Perspectives
Giorgio Visentin, Mustapha Laatiaoui, Larry A. Viehland +1
The current status of gaseous transport studies of the singly-charged lanthanide and actinide ions is reviewed in light of potential applications to superheavy ions. The measuremen…
Laser Resonance Chromatography of Superheavy Elements
Mustapha Laatiaoui, Alexei A. Buchachenko, Larry A. Viehland
Optical spectroscopy constitutes the historical path to accumulate basic knowledge on the atom and its structure. Former work based on fluorescence and resonance ionization spectro…
Exploiting transport properties for the detection of optical pumping in heavy ions
Mustapha Laatiaoui, Alexei A. Buchachenko, Larry A. Viehland
We present a kinetic model for optical pumping in Lu and Lr ions as well as a theoretical approach to calculate the transport properties of Lu in its ground and…
High-precision ab initio calculations of the spectrum of Lr
E. V. Kahl, J. C. Berengut, M. Laatiaoui +2
The planned measurement of optical resonances in singly-ionised lawrencium (Z = 103) requires accurate theoretical predictions to narrow the search window. We present high-precisio…
An alternative approach to populate and study the Th nuclear clock isomer
M. Verlinde, S. Kraemer, J. Moens +24
A new approach to observe the radiative decay of the Th nuclear isomer, and to determine its energy and radiative lifetime, is presented. Situated at a uniquely low excitat…
Direct detection of the 229Th nuclear clock transition
Lars von der Wense, Benedict Seiferle, Mustapha Laatiaoui +9
Today's most precise time and frequency measurements are performed with optical atomic clocks. However, it has been proposed that they could potentially be outperformed by a nuclea…
The extraction of 229Th3+ from a buffer-gas stopping cell
Lars von der Wense, Benedict Seiferle, Mustapha Laatiaoui +1
In the whole landscape of atomic nuclei, Th is currently the only known nucleus which could allow for the development of a nuclear-based frequency standard, as it possesses…
Determination of the extraction efficiency for U source -recoil ions from the MLL buffer-gas stopping cell
Lars von der Wense, Benedict Seiferle, Mustapha Laatiaoui +1
Following the decay of U, Th recoil ions are shown to be extracted in a significant amount from the MLL buffer-gas stopping cell. The produced recoil ions and s…
A VUV detection system for the direct photonic identification of the first excited isomeric state of Th
Benedict Seiferle, Lars von der Wense, Mustapha Laatiaoui +1
With an expected energy of 7.6(5) eV, Th possesses the lowest excited nuclear state in the landscape of all presently known nuclei. The energy corresponds to a wavelength o…
Towards a direct transition energy measurement of the lowest nuclear excitation in 229Th
L. v. d. Wense, P. G. Thirolf, D. Kalb +1
The isomeric first excited state of the isotope 229Th exhibits the lowest nuclear excitation energy in the whole landscape of known atomic nuclei. For a long time this energy was r…
Variable Very High Energy Gamma-ray Emission from the Microquasar LS I +61 303
MAGIC Collaboration, J. Albert
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and laboratories for elucidating the physics of relativistic j…