From: Sympathetic cooling of molecular ions with ultracold atoms
Gas | α (a.u.) | ρ (cm −3) | T n | T create | T u | T maintain |
---|---|---|---|---|---|---|
3He | 1.38 | 1014 | 170 mK | 10 K | 2 K | 300 mK |
4He | 1.38 | 1014 | 4 K | 10 K | – | – |
23Na | 163 | 1012 | 100 μK | 30 K | 800 mK | 200 μK |
87Rb | 319 | 1012 | 10 μK | 30 K | 800 mK | 40 μK |
40Ca | 157 | 1010 | 4 mK | 300 K | – | – |