&lt;sup&gt;229m&lt;/sup&gt;Thと&lt;sup&gt;235m&lt;/sup&gt;Uの核壊変の化学状態依存性

Kasamatsu, Y.; Kikunaga, H.

doi:10.3769/radioisotopes.67.471

Cited by 2 publications

(2 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has long been known from theory that, due to the extraordinarily low excitation energy of 229m Th, no single isomeric lifetime exists. Instead, the lifetime is heavily dependent on the electronic environment of the 229 Th nuclei [169,177,284,342,366,369]. If the internal conversion decay channel is energetically allowed, the isomeric state will decay on the timescale of a few microseconds via internal conversion and emission of an electron.…”

Section: Measuring the Isomeric Lifetimementioning

confidence: 99%

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

Wense

2020

Eur. Phys. J. A

View full text Add to dashboard Cite

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.

show abstract

Section: Measuring the Isomeric Lifetimementioning

confidence: 99%

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

Wense

2020

Eur. Phys. J. A

View full text Add to dashboard Cite

show abstract

“…In these early publications the excitation with broad-band (incoherent) light sources was in the focus. The density matrix formalism, as required to describe narrow-band excitation with coherent light sources, was applied to 229m Th in [Kazakov 2011, Kazakov 2012]. Also nuclear two-photon excitation with a frequency comb was discussed [Romanenko2012].…”

Section: Appendix a The Theory Of 229m Th Excitation And Decaymentioning

confidence: 99%

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

von der Wense,

Seiferle

2020

Preprint

View full text Add to dashboard Cite

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.

show abstract

<sup>229m</sup>Thと<sup>235m</sup>Uの核壊変の化学状態依存性

Abstract: Science of Heavy and Superheavy Elements (Chemistry) Variation of the Nuclear Decay Constants of 229m Th and 235m U A ected by Their Chemical Environments

Cited by 2 publications

References 48 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

Contact Info

Product

Resources

About