Related terms:
rubidium
trapped ion
hydrogen maser
gustav kirchhoff
robert bunsen
atomic clock
si second
atomic time
kirchhoff
alkali metals
fractional crystallization
energy associated
caesium compounds
caesium hydroxide
caesium fluoride
electric quadrupole
frequency standard
other alkali metals
amplification by stimulated emission
hyperfine structure
rubidium chloride
gas cell
photoelectric cells
motion of the sun
current definition
frequency comb
Wikipedia sources:
Hyperfine structure
Hydrogen line
Atomic clock
Caesium
RKKY interaction
Trapped ion quantum computer
Copper proteins
Rubidium
Maser
Optical pumping
Second
New SI definitions
Magneto-optical trap
Context for words:
hyperfine
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