17 июл. 2024 г. · The post refers to the definition of the second based on the cesium-133 atom's hyperfine transition frequency. |
24 янв. 2024 г. · The unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, to be 9192631770 when expressed in the unit Hz, which is equal to s−1. |
2 июн. 2011 г. · Due to the virtually non-existent magnetic dipole moment of these two states, the transition frequency is unaffected by stray magnetic fields. |
8 сент. 2024 г. · Since 1967 the SI second is defined as 'the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom'. This transition ... |
17 июл. 2015 г. · When a hyperfine transition occurs, we can measure the frequency of the microwaves emitted, and say that a second is the period of time that ... |
31 авг. 2020 г. · 1.42 GHz corresponds to hyperfine transition in electronic ground state: i.e. difference on energy between electron and proton spins being ... |
18 мая 2015 г. · The definition of a second is "the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine ... |
16 июн. 2014 г. · The "second" is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ... |
13 апр. 2023 г. · Also the hyperfine frequency is higher than most other elements. This allows more accurate measurements. These properties together make it a ... |
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