Binnewies, T.; Wilpers, G.; Sterr, U.; Riehle, F.; Helmcke, J. et al.: Doppler Cooling and Trapping on Forbidden Transitions. In: Physical Review Letters 87 (2001), Nr. 12, 123002. DOI:
https://doi.org/10.1103/PhysRevLett.87.123002
Abstract: |
Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of 40Ca atoms has been cooled and trapped to a temperature as low as 6μK by operating a magnetooptical trap on the spin-forbidden intercombination transition. Quenching the long-lived excited state with an additional laser enhanced the scattering rate by a factor of 15, while a high selectivity in velocity was preserved. With this method, more than 10% of precooled atoms from a standard magnetooptical trap have been transferred to the ultracold trap. Monte Carlo simulations of the cooling process are in good agreement with the experiments. © 2001 The American Physical Society.
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License of this version: |
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Publication type: |
Article |
Publishing status: |
publishedVersion |
Publication date: |
2001 |
Keywords english: |
Calcium, Computer simulation, Doppler effect, Ground state, Laser beams, Magnetic fields, Monte Carlo methods, Temperature, Bloch equations, Doppler cooling, Magnetooptical trap, Ultracold atoms, Atoms
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DDC: |
530 | Physik
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