| Autor: |
Kraft, Sebastian, Vogt, Felix, Appel, Oliver, Riehle, Fritz, Sterr, Uwe |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 103, 130401 (2009) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.103.130401 |
| Popis: |
We have achieved Bose-Einstein condensation of $^{40}$Ca, the first for an alkaline earth element. The influence of elastic and inelastic collisions associated with the large ground state s-wave scattering length of $^{40}$Ca was measured. From these findings, an optimized loading and cooling scheme was developed that allowed us to condense about $2 \cdot 10^4$ atoms after laser cooling in a two-stage magneto-optical trap and subsequent forced evaporation in a crossed dipole trap within less than 3 s. The condensation of an alkaline earth element opens novel opportunities for precision measurements on the narrow intercombination lines as well as investigations of molecular states at the $^1$S--$^3$P asymptotes. |
| Databáze: |
arXiv |
| Externí odkaz: |
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