Citation
Abstract
We report measured buffer gas collision shifts of the 40.507347996xx-GHz mercury ion clock transition using inert helium, neon, and argon gases and getterable molecular hydrogen and nitrogen gases. The frequency shift due to methane also was examined. At low partial pressures, methane gas did not impact the trapped ion number but was observed to strongly relax the population difference in the two hyperfine clock states, thereby reducing the clock resonance signal. A similar population relaxation also was observed for other molecular buffer gases (N , H ) but 2 2 at a much reduced rate.
Keywords
gas frequency shifts
microwave mercury ion clocks
Details
- Volume
- 42-159
- Published
- November 15, 2004
- Pages
- 1–8
- File Size
- 239.5 KB