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arXiv physics/0612046physics.atom-ph
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光激发产生亚稳氪原子热束

A Thermal Beam of Metastable Krypton Atoms Produced by Optical Excitation

Y. Ding, S. -M. Hu, K. Bailey, A. M. Davis, R. W. Dunford, Z. -T. Lu, T. P. O'Connor, L. Young

摘要:

利用光激发方法,在室温下获得了亚稳5s[3/2]2能级的氪原子束。用氪放电灯产生124 nm的真空紫外光子,作为从基态4p 6 1 S 0到5s[3/2]1能级的第一步激发。使用819 nm Ti:Sapphire激光器进行从5s[3/2]1到5 p [3/2]1的第二步激发,随后自发衰减到5s[3/2]2亚稳能级。在总气体流速为0.01 cm^3 STP/s(或3 x 10^17 atoms/s)时,获得了角通量密度为3 x 10^14 /s/sr的亚稳态原子束。研究了流量与气体流量、激光功率和灯参数的关系。

英文摘要:

A room-temperature beam of krypton atoms in the metastable 5s[3/2]2 level is demonstrated via an optical excitation method. A Kr-discharge lamp is used to produce VUV photons at 124 nm for the first-step excitation from the ground-level 4p6 1S0 to the 5s[3/2]1 level. An 819 nm Ti:Sapphire laser is used for the second-step excitation from 5s[3/2]1 to 5p[3/2]1, followed by a spontaneous decay to the 5s[3/2]2 metastable level. A metastable atomic beam with an angular flux density of 3 x 10^14 /s/sr is achieved at the total gas flow rate of 0.01 cm^3 STP/s (or 3 x 10^17 atoms/s). The dependences of the flux on the gas flow rate, laser power, and lamp parameters are investigated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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