Open AccessThermal beam of metastable krypton atoms produced by optical excitation
Author(s) -
Yue Ding,
Shui-Ming Hu,
K. Bailey,
A. M. Davis,
R. W. Dunford,
ZhengTian Lu,
Thomas P. O’Connor,
Linda Young
Publication year - 2007
Publication title -
review of scientific instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.605
H-Index - 165
eISSN - 1089-7623
pISSN - 0034-6748
DOI - 10.1063/1.2437193
Subject(s) - krypton , metastability , atomic physics , excitation , beam (structure) , laser , sapphire , xenon , chemistry , physics , optics , quantum mechanics , organic chemistry
A room-temperature beam of krypton atoms in the metastable 5s[3/2]2 level isdemonstrated via an optical excitation method. A Kr-discharge lamp is used toproduce VUV photons at 124 nm for the first-step excitation from theground-level 4p6 1S0 to the 5s[3/2]1 level. An 819 nm Ti:Sapphire laser is usedfor the second-step excitation from 5s[3/2]1 to 5p[3/2]1, followed by aspontaneous decay to the 5s[3/2]2 metastable level. A metastable atomic beamwith an angular flux density of 3 x 10^14 /s/sr is achieved at the total gasflow rate of 0.01 cm^3 STP/s (or 3 x 10^17 atoms/s). The dependences of theflux on the gas flow rate, laser power, and lamp parameters are investigated
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