Magnetic Trapping of Cold Methyl Radicals.
Magnetic Trapping of Cold Methyl Radicals.
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DOI：
10.1103/physrevlett.118.093201
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发表时间：
2016-09
影响因子：
8.6
通讯作者：
Yang Liu;M. Vashishta;Pavle Djuricanin;Sida Zhou;W. Zhong;Tony Mittertreiner;D. Carty;T. Momose
中科院分区：
文献类型：
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作者：
Yang Liu;M. Vashishta;Pavle Djuricanin;Sida Zhou;W. Zhong;Tony Mittertreiner;D. Carty;T. Momose
我们证明了用磁分子减速器将处于基态的甲基自由基（CH_{3}）束流减速到静止状态，并成功地在反亥姆霍兹磁阱中捕获了大于1 s的甲基自由基。捕获的CH_{3}自由基的平均平动温度约为200 mK，密度估计为>5.0×10^{7} cm^{-3}。甲基自由基是研究冷分子的理想体系，不仅因为它在低温下的高反应性，而且还因为进一步冷却低于1 mK是合理的，通过与超冷原子的交感冷却。所展示的甲基自由基的捕获能力开辟了实现超冷合奏的分子对玻色-爱因斯坦凝聚的多原子分子和调查的反应受量子统计的各种可能性。
We have demonstrated that a supersonic beam of methyl radicals (CH_{3}) in the ground rotational state of both para and ortho species has been slowed down to standstill with a magnetic molecular decelerator, and successfully captured spatially in an anti-Helmholtz magnetic trap for >1 s. The trapped CH_{3} radicals have a mean translational temperature of about 200 mK with an estimated density of >5.0×10^{7} cm^{-3}. The methyl radical is an ideal system for the study of cold molecules not only because of its high reactivities at low temperatures, but also because further cooling below 1 mK is plausible via sympathetic cooling with ultracold atoms. The demonstrated trapping capability of methyl radicals opens up various possibilities for realizing ultracold ensembles of molecules towards Bose-Einstein condensation of polyatomic molecules and investigations of reactions governed by quantum statistics.