| 摘要 |
The frequency standard comprises an oven producing a beam of Rb85 and Rb87, a lamp using Rb85 for enriching the level F = 1 of the fundamental state of the atoms of Rb87, a hyperfrequency cavity equalizing the population of the levels F = 1, mF = 0 and F = 2, mF = 0 of this state, a lamp using Rb87 or natural Rb filtered by a vat containing Rb85 for producing transitions between the levels F = 1 of the fundamental state and an excited level, and a detector completed by an electronic unit coupling a quartz oscillator to the atomic resonance.
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