Fabian Schaden
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View article: Laser-induced quenching of the Th-229 nuclear clock isomer in calcium fluoride
Laser-induced quenching of the Th-229 nuclear clock isomer in calcium fluoride Open
The 10-min radiative lifetime of the first excited Th4+229 nuclear state in ionic crystals provides narrow spectroscopic linewidths, enabling the realization of a solid-state nuclear clock. Due to the 4+ noble gas configuration, electronic…
View article: Characterization of the thorium-229 defect structure in CaF<sub>2</sub> crystals
Characterization of the thorium-229 defect structure in CaF<sub>2</sub> crystals Open
Recent advancements in laser excitation of the low-energy thorium-229 ( 229 Th) nuclear isomeric state in calcium fluoride (CaF 2 ) single crystals render this system a promising candidate for a solid-state nuclear clock. Nonetheless, the …
View article: Radiative decay of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Th</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>229</mml:mn><mml:mi>m</mml:mi></mml:mrow></mml:mmultiscripts></mml:math> nuclear clock isomer in different host materials
Radiative decay of the nuclear clock isomer in different host materials Open
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the Th229m nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photons and…
View article: Laser-Induced Quenching of the Th-229 Nuclear Clock Isomer in Calcium Fluoride
Laser-Induced Quenching of the Th-229 Nuclear Clock Isomer in Calcium Fluoride Open
The 10-minute radiative lifetime of the first excited $^{229}$Th$^{4+}$ nuclear state in ionic crystals provides narrow spectroscopic linewidths, enabling the realization of a solid-state nuclear clock. Due to the 4+ noble gas configuratio…
View article: A method to detect the VUV photons from cooled $^{229}$Th:CaF$_2$ crystals
A method to detect the VUV photons from cooled $^{229}$Th:CaF$_2$ crystals Open
Thorium-229, with its exceptionally low-energy nuclear excited state, is a key candidate for developing nuclear clocks. $^{229}$Th-doped CaF$_2$ crystals, benefiting from calcium fluoride's wide band gap, show great promise as solid-state …
View article: Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials
Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials Open
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the $^{229m}$Th nuclear clock isomer embedded in different host materials is reported. The ratio of the number of radiative decay photon…
View article: Laser Excitation of the Th-229 Nucleus
Laser Excitation of the Th-229 Nucleus Open
The 8.4 eV nuclear isomer state in Th-229 is resonantly excited in Th-doped CaF2 crystals using a tabletop tunable laser system. A resonance fluorescence signal is observed in two crystals with different Th-229 dopant concentrations, while…
View article: Optical transmission enhancement of ionic crystals via superionic fluoride transfer: Growing VUV-transparent radioactive crystals
Optical transmission enhancement of ionic crystals via superionic fluoride transfer: Growing VUV-transparent radioactive crystals Open
The 8−eV first nuclear excited state in Th229 is a candidate for implementing a nuclear clock. Doping Th229 into ionic crystals such as CaF2 is expected to suppress nonradiative decay, enabling nuclear spectroscopy and the realization of a…
View article: Optical Transmission Enhancement of Ionic Crystals via Superionic Fluoride Transfer: Growing VUV-Transparent Radioactive Crystals
Optical Transmission Enhancement of Ionic Crystals via Superionic Fluoride Transfer: Growing VUV-Transparent Radioactive Crystals Open
The 8 eV first nuclear excited state in $^{229}$Th is a candidate for implementing an nuclear clock. Doping $^{229}$Th into ionic crystals such as CaF$_2$ is expected to suppress non-radiative decay, enabling nuclear spectroscopy and the r…
View article: Growth and characterization of thorium-doped calcium fluoride single crystals
Growth and characterization of thorium-doped calcium fluoride single crystals Open
We have grown $^{232}$Th:CaF$_2$ and $^{229}$Th:CaF$_2$ single crystals for investigations on the VUV laser-accessible first nuclear excited state of $^{229}$Th. To reach high doping concentrations despite the extreme scarcity (and radioac…