| Autor: |
Jing-feng Xiang, He-nan Cheng, Xiang-kai Peng, Xin-wen Wang, Wei Ren, Jing-wei Ji, Kang-kang Liu, Jian-bo Zhao, Lin Li, Qiu-zhi Qu, Tang Li, Bin Wang, Mei-feng Ye, Xin Zhao, Yuan-yuan Yao, De-Sheng Lü, Liang Liu |
| Předmět: |
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| Zdroj: |
Chinese Physics B; July2018, Vol. 27 Issue 7, p1-1, 1p |
| Abstrakt: |
The loss rate of cold atoms in a trap due to residual gas collisions differs from that in a free state after the cold atoms are released from the trap. In this paper, the loss rate in a cold rubidium-87 atom cloud was measured in a magneto-optical trap (MOT) and during its free flight. The residual gas pressure was analyzed by a residual gas analyzer, and the pressure distribution in a vacuum chamber was numerically calculated by the angular coefficient method. The decay factor, which describes the decay behavior of cold atoms due to residual gas collisions during a free flight, was calculated. It was found that the decay factor agrees well with theoretical predictions under various vacuum conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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