A Thermal Beam of Metastable Krypton Atoms Produced by Optical Excitation
Atomic Physics
2015-06-26 v1
Abstract
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.
Keywords
Cite
@article{arxiv.physics/0612046,
title = {A Thermal Beam of Metastable Krypton Atoms Produced by Optical Excitation},
author = {Y. Ding and S. -M. Hu and K. Bailey and A. M. Davis and R. W. Dunford and Z. -T. Lu and T. P. O'Connor and L. Young},
journal= {arXiv preprint arXiv:physics/0612046},
year = {2015}
}