Cesium is a metal in group IA of the periodic table with atomic number 55, an atomic weight of 132.905, and a density of 1.9 Mg/m 3. Its melting point is 28.7 C, and it boils at 690 C. The electronic ...

Maybe that’s even more than half of the fun. [CuriousMarc] got an HP 5061A Cesium clock, a somewhat famous instrument as the model that attempted to prove the theory of relativity. The reason?

Cesium atomic clocks define a second with a fractional ... At this clock precision, physicists can observe Einstein’s general theory of relativity – which states that gravity affects the ...

We normally think of atomic clocks as the gold standard in timekeeping ... two hyperfine levels of the ground state of a stationary cesium-133 atom at a temperature of 0K. But there is a move ...

Cesium-137, also known as Cs-137, was first released into the atmosphere during Oppenheimer’s Trinity test on July 16, 1945, ...

An optical lattice clock is a type of atomic clock that can be 100 times more accurate than cesium atomic clocks, the current ...

As the world’s first commercial optical cesium atomic clock, the OSA 3300 HP provides unmatched timing accuracy and long-term stability, offering a 10-year lifespan compared to the five-year ...