Alternative approach to populate and study the 
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 nuclear clock isomer

Verlinde, M.; Kraemer, Sandro; Moens, Janni; Chrysalidis, K.; Correia, J. G.; Cottenier, Stefaan; Witte, H. De; Fedorov, D. V.; Fedosseev, Valentin; Ferrer, R.; Fraile, L. M.; Geldhof, S.; Granados, C.; Laatiaoui, M.; Lima, T. A. L.; Lin, Pin; Manea, V.; Marsh, B. A.; Moore, I. D.; Pereira, L. M. C.; Raeder, S.; Bergh, P. Van den; Duppen, P. Van; Vantomme, André; Verstraelen, E.; Wahl, Ulrich; Wilkins, S. G.

doi:10.1103/physrevc.100.024315

Cited by 20 publications

(8 citation statements)

References 50 publications

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“…Observation of the isomer's radiative decay would provide a spectroscopic determination of its energy. First experimental results were reported [394].…”

Section: Population Via a Natural Decay Branchmentioning

confidence: 99%

“…Early results of an experiment carried out at ISOLDE (CERN) with the goal of populating the isomer via the ≈ 13% branching ratio in the β decay of 229 Ac were reported in [394]. While ultimately aiming for the detection of photons emitted during the isomeric decay, a search for the internal conversion electrons was also performed.…”

Section: Continued Efforts For Ic Detectionmentioning

confidence: 99%

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The $$^{229}$$Th isomer: prospects for a nuclear optical clock

Wense

2020

Eur. Phys. J. A

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The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency uncertainty of about $$10^{-19}$$ 10 - 19 has rendered a nuclear clock an interesting tool for many applications, potentially even for a re-definition of the second. The focus of the corresponding research is a nuclear transition of the $$^{229}$$ 229 Th nucleus, which possesses a uniquely low nuclear excitation energy of only $$8.12\pm 0.11$$ 8.12 ± 0.11 eV ($$152.7\pm 2.1$$ 152.7 ± 2.1 nm). This energy is sufficiently low to allow for nuclear laser spectroscopy, an inherent requirement for a nuclear clock. Recently, some significant progress toward the development of a nuclear frequency standard has been made and by today there is no doubt that a nuclear clock will become reality, most likely not even in the too far future. Here we present a comprehensive review of the current status of nuclear clock development with the objective of providing a rather complete list of literature related to the topic, which could serve as a reference for future investigations.

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“…Observation of the isomer's radiative decay would provide a spectroscopic determination of its energy. First experimental results were reported [394].…”

Section: Population Via a Natural Decay Branchmentioning

confidence: 99%

Section: Continued Efforts For Ic Detectionmentioning

confidence: 99%

The $$^{229}$$Th isomer: prospects for a nuclear optical clock

Wense

2020

Eur. Phys. J. A

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show abstract

“…Observation of the isomer's radiative decay would provide a spectroscopic determination of its energy. First experimental results were reported [Verlinde 2019].…”

Section: Population Via a Natural Decay Branchmentioning

confidence: 99%

“…Early results of an experiment carried out at ISOLDE (Cern) with the goal of populating the isomer via the ≈ 13% branching ratio in the β decay of 229 Ac were reported in [Verlinde 2019]. While ultimately aiming for the detection of photons emitted during the isomeric decay, a search for the internal conversion electrons was also performed.…”

Section: Continued Efforts For Ic Detectionmentioning

confidence: 99%

The $^{229}$Th isomer: prospects for a nuclear optical clock

von der Wense,

Seiferle

2020

Preprint

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The proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency uncertainty of about 10 −19 has rendered a nuclear clock an interesting tool for many applications, potentially even for a re-definition of the second. The focus of the corresponding research is a nuclear transition of the 229 Th nucleus, which possesses a uniquely low nuclear excitation energy of only 8.12 ± 0.11 eV (152.7 ± 2.1 nm). This energy is sufficiently low to allow for nuclear laser spectroscopy, an inherent requirement for a nuclear clock. Recently, some significant progress toward the development of a nuclear frequency standard has been made and by today there is no doubt that a nuclear clock will become reality, most likely not even in the too far future. Here we present a comprehensive review of the current status of nuclear clock development with the objective of providing a rather complete list of literature related to the topic, which could serve as a reference for future investigations.

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“…Its exact energy value was debated over the years before the recent final isomer's direct detection via the internal conversion decay channel [16]. New ways to precisely measure the frequency of the nuclear clock transition are also emerging [20][21][22][23][24][25][26][27], with the electron bridge process having application to 229 Th 3+ [28,29]. A clock operating on this transition is an approach pursued to overcome the challenges of present optical clocks [30].…”

Section: Introductionmentioning

confidence: 99%

Studies of thorium and ytterbium ion trap loading from laser ablation for gravity monitoring with nuclear clocks

Piotrowski¹,

Scarabel²,

Lobino³

et al. 2020

OSA Continuum

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Compact and robust ion traps for thorium are enabling technology for the next generation of atomic clocks based on a low-energy isomeric transition in the thorium-229 nucleus. We aim at a laser ablation loading of single triply ionized thorium in a radio-frequency electromagnetic linear Paul trap. Detection of ions is based on a modified mass spectrometer and a channeltron with single-ion sensitivity. In this study, we successfully created and detected 232 Th + and 232 Th 2+ ions from plasma plumes, studied their yield evolution, and compared the loading to a quadrupole ion trap with Yb. We explore the feasibility of laser ablation loading for future low-cost 229 Th 3+ trapping. The thorium ablation yield shows a strong depletion, suggesting that we have ablated oxide layers from the surface and the ions were a result of the plasma plume evolution and collisions. Our results are in good agreement with similar experiments for other elements and their oxides.

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Alternative approach to populate and study the Th229 nuclear clock isomer

Cited by 20 publications

References 50 publications

The $$^{229}$$Th isomer: prospects for a nuclear optical clock

The $$^{229}$$Th isomer: prospects for a nuclear optical clock

The $^{229}$Th isomer: prospects for a nuclear optical clock

Studies of thorium and ytterbium ion trap loading from laser ablation for gravity monitoring with nuclear clocks

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