M. Block
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View article: Central Limit Theorem for Random “Contractive” Functions on Interval
Central Limit Theorem for Random “Contractive” Functions on Interval Open
We use the approach from Czudek and Szarek (see [1]) to prove the central limit theorem for a stationary Markov chain generated by an iterative function system for a family of increasing, injective functions on [0, 1] with “contractive” pr…
View article: Enhancing nondestructive mass identification via Fourier-transform fluorescence analysis
Enhancing nondestructive mass identification via Fourier-transform fluorescence analysis Open
Single-ion mass identification is important for atomic and nuclear physics experiments on ions produced with low yields. Cooling the ion to ultralow temperatures through interaction with a laser-cooled ion will enhance the precision of the…
View article: Masses of transuranium nuclides measured with the PI-ICR technique at TRIGA-Trap
Masses of transuranium nuclides measured with the PI-ICR technique at TRIGA-Trap Open
We have revisited the region of the actinides in the vicinity of the neutron number N =152 and conducted high-precision mass measurements using the newly implemented Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique. The masses of $…
View article: Enhancing non-destructive mass identification via Fourier-transform fluorescence analysis
Enhancing non-destructive mass identification via Fourier-transform fluorescence analysis Open
Single-ion mass identification is important for atomic and nuclear physics experiments on ions produced with low yields. Cooling the ion to ultra-low temperatures by interacting with a laser-cooled ion will enhance the precision of the mea…
View article: Manifestation of relativistic effects in the chemical properties of nihonium and moscovium revealed by gas chromatography studies
Manifestation of relativistic effects in the chemical properties of nihonium and moscovium revealed by gas chromatography studies Open
Chemical reactivity of the superheavy elements nihonium (Nh, element 113) and moscovium (Mc, element 115) has been studied by the gas-solid chromatography method using a new combined chromatography and detection setup. The Mc isotope, 288 …
View article: Laser resonance chromatography: First commissioning results and future prospects
Laser resonance chromatography: First commissioning results and future prospects Open
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 region of the heaviest elements beyond nobelium. In our st…
View article: Electronic State Chromatography of Lutetium Cations
Electronic State Chromatography of Lutetium Cations Open
Relativistic effects strongly influence the electronic structures of the heaviest elements, thereby shaping their chemical and physical properties. Studying ion mobility within a noble gas environment reveals how the ion-neutral interactio…
View article: In-gas-jet laser spectroscopy of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>No</mml:mi><mml:mprescripts/><mml:none/><mml:mn>254</mml:mn></mml:mmultiscripts></mml:math> with JetRIS
In-gas-jet laser spectroscopy of with JetRIS Open
Here we report online results with the in-gas-Jet Resonance Ionization Spectroscopy (JetRIS) apparatus. The S01↔P11 transition of No254 was successfully measured with sub-GHz resolution, marking a fivefold improvement over previous measure…
View article: Laser Resonance Chromatography: First Commissioning Results and Future Prospects
Laser Resonance Chromatography: First Commissioning Results and Future Prospects Open
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 region of the heaviest elements beyond nobelium. In our st…
View article: Penning-trap eigenfrequency measurements with optical radiofrequency detectors
Penning-trap eigenfrequency measurements with optical radiofrequency detectors Open
We use an electric-dipole laser-driven transition to precisely measure the cyclotron-frequency ratios of the pairs $^{42}$Ca$^+$-$^{40}$Ca$^+$, $^{44}$Ca$^+$-$^{40}$Ca$^+$ and $^{48}$Ca$^+$-$^{40}$Ca$^+$ in a 7-tesla Penning trap. A single…
View article: Coupled-oscillator model to analyze the interaction between a quartz resonator and trapped ions
Coupled-oscillator model to analyze the interaction between a quartz resonator and trapped ions Open
The novel application of a piezoelectric quartz resonator for the detection of trapped ions has enabled
\nthe observation of the quartz-ions interaction under nonequilibrium conditions, opening new perspectives for
\nhigh-sensitive motiona…
View article: State-specific ion mobilities of Lr^+ (Z = 103) in helium
State-specific ion mobilities of Lr^+ (Z = 103) in helium Open
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 this end we applied the multi-reference configuration interac…
View article: First application of the phase-imaging ion-cyclotron resonance technique at TRIGA-Trap
First application of the phase-imaging ion-cyclotron resonance technique at TRIGA-Trap Open
The phase-imaging ion cyclotron resonance technique (PI-ICR) has been implemented at TRIGA-Trap together with a newly built five-pole cylindrical trap. In PI-ICR the total phase of trapped ions is measured by projecting the ion motion onto…
View article: RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility
RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility Open
RAPTOR, Resonance ionization spectroscopy And Purification Traps for Optimized spectRoscopy, is a new collinear resonance ionization spectroscopy device constructed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the Univer…
View article: Nuclear Reaction Studies and Prospects for the New MARA-LEB Facility
Nuclear Reaction Studies and Prospects for the New MARA-LEB Facility Open
A Low Energy Branch for the MARA separator, MARA-LEB, is under construction at the University of Jyväskylä, Finland. It will be used to purify and study exotic beams initially via nuclear decay and laser spectroscopy. Two experiments have …
View article: Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP
Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP Open
Direct mass measurements in the region of the heaviest elements were performed with the Penning-trap mass spectrometer SHIPTRAP at GSI Darmstadt. Utilizing the phase-imaging ion-cyclotron-resonance mass-spectrometry technique, the atomic m…
View article: Atomic-structure investigations of neutral einsteinium by laser resonance ionization
Atomic-structure investigations of neutral einsteinium by laser resonance ionization Open
sponsorship: This research was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Heavy Elements Chemistry Program, under Award No. DE-FG02-13ER16414. The isotope used in this research was suppl…
View article: A Progress Report on Laser Resonance Chromatography
A Progress Report on Laser Resonance Chromatography Open
Research on superheavy elements enables probing the limits of nuclear existence and provides a fertile ground to advance our understanding of the atom’s structure. However, experimental access to these atomic species is very challenging an…
View article: On the adsorption and reactivity of element 114, flerovium
On the adsorption and reactivity of element 114, flerovium Open
Flerovium (Fl, element 114) is the heaviest element chemically studied so far. To date, its interaction with gold was investigated in two gas-solid chromatography experiments, which reported two different types of interaction, however, eac…
View article: A Coupled-Oscillators Model to Analyze the Interaction between a Quartz Resonator and Trapped Ions
A Coupled-Oscillators Model to Analyze the Interaction between a Quartz Resonator and Trapped Ions Open
The novel application of a piezoelectric quartz resonator for the detection of trapped ions has developed in the observation of the quartz-ions interaction under non-equilibrium conditions, opening new perspectives for high-sensitive motio…
View article: Formation of two-ion crystals by injection from a Paul-trap source into a high-magnetic-field Penning trap
Formation of two-ion crystals by injection from a Paul-trap source into a high-magnetic-field Penning trap Open
Two-ion crystals constitute a platform for investigations of quantum nature that can be extended to any ion
\nspecies or charged particle provided one of the ions in the crystal can be directly laser cooled and manipulated
\nwith laser rad…
View article: Resolution Characterizations of JetRIS in Mainz Using 164Dy
Resolution Characterizations of JetRIS in Mainz Using 164Dy Open
Laser spectroscopic studies of elements in the heavy actinide and transactinide region help understand the nuclear ground state properties of these heavy systems. Pioneering experiments at GSI, Darmstadt identified the first atomic transit…