A nuclear clock or nuclear optical clock is a notional clock that would use the frequency of a nuclear transition as its reference frequency, in the same manner as an atomic clock uses the frequency of an electronic transition in an atom's shell. Such a clock is expected to be more accurate than the best current atomic clocks by a factor of about 10, with an achievable accuracy approaching the 10−19 level.The only nuclear state suitable for the development of a nuclear clock using existing technology is thorium-229m, a nuclear isomer of thorium-229 and the lowest-energy nuclear isomer known. With an energy of about 8 eV,the corresponding ground-state transition is expected to be in the vacuum ultraviolet wavelength region around 150 nm, which would make it accessible to laser excitation. A
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| - Atomkernuhr (de)
- Horloge nucléaire (fr)
- 핵시계 (ko)
- Nuclear clock (en)
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| - L'utilisation d'une transition à l'intérieur d'un noyau atomique pourrait être mise à profit pour développer une horloge nucléaire. Celle-ci serait très stable et peu susceptible aux perturbations extérieures. Plusieurs groupes de recherche travaillent sur des horloges nucléaires fondées sur des noyaux d'ions thorium 229 (229Th3+). (fr)
- 핵시계는 원자핵의 전이 진동수를 이용하는 시계다. (ko)
- A nuclear clock or nuclear optical clock is a notional clock that would use the frequency of a nuclear transition as its reference frequency, in the same manner as an atomic clock uses the frequency of an electronic transition in an atom's shell. Such a clock is expected to be more accurate than the best current atomic clocks by a factor of about 10, with an achievable accuracy approaching the 10−19 level.The only nuclear state suitable for the development of a nuclear clock using existing technology is thorium-229m, a nuclear isomer of thorium-229 and the lowest-energy nuclear isomer known. With an energy of about 8 eV,the corresponding ground-state transition is expected to be in the vacuum ultraviolet wavelength region around 150 nm, which would make it accessible to laser excitation. A (en)
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| - Concept of a thorium-229 based nuclear optical clock. (en)
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| - L'utilisation d'une transition à l'intérieur d'un noyau atomique pourrait être mise à profit pour développer une horloge nucléaire. Celle-ci serait très stable et peu susceptible aux perturbations extérieures. Plusieurs groupes de recherche travaillent sur des horloges nucléaires fondées sur des noyaux d'ions thorium 229 (229Th3+). (fr)
- A nuclear clock or nuclear optical clock is a notional clock that would use the frequency of a nuclear transition as its reference frequency, in the same manner as an atomic clock uses the frequency of an electronic transition in an atom's shell. Such a clock is expected to be more accurate than the best current atomic clocks by a factor of about 10, with an achievable accuracy approaching the 10−19 level.The only nuclear state suitable for the development of a nuclear clock using existing technology is thorium-229m, a nuclear isomer of thorium-229 and the lowest-energy nuclear isomer known. With an energy of about 8 eV,the corresponding ground-state transition is expected to be in the vacuum ultraviolet wavelength region around 150 nm, which would make it accessible to laser excitation. A comprehensive review can be found in reference. (en)
- 핵시계는 원자핵의 전이 진동수를 이용하는 시계다. (ko)
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