Moreover, the nucleus of caesium-133 has a nuclear spin equal to 7/2. The simultaneous presence of electron spin and nuclear spin leads, by a mechanism called ...
Note that this frequency occurs when the Cesium-133 atom is in isolation at absolute zero temperature; in reality corrections for this are necessary. Still, the ...
Cesium-133 is the only natural isotope (100% natural abundance). Cesium has no known biological role, but may substitute for potassium and so is relatively ...
It is produced by irradiating the stable isotope cobalt-59 with neutrons in a nuclear reactor. Cobalt-60 is used in the inspection of materials to reveal ...
2021年5月14日 — The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the caesium frequency ΔvCs, the unperturbed ...