Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
79 (1996), S. 565-569
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Sub-Doppler resolution of atomic transitions is obtained by spatially resolved laser induced fluorescence in a diverging atomic beam created by laser ablation. Resonances are spatially separated by relativistic effects experienced between the probing radiation and the moving particles thus proving that it is a high-quality atomic beam. Fast neutral atomic beams of 89Y having centroid energies up to 12 eV are interrogated with tuned, single-frequency laser light. Narrow, spatially separated points of light move along the probe axis and are imaged by detecting only the zero-velocity components of the fluorescence. Accordingly, the Y 2D3/2→Y 2D03/2 transition centered near 16 146 cm−1 is resolved into its hyperfine components with line widths on the order of 55 MHz and with an equivalent resolution of ±5 MHz (±0.0002 cm−1). The upper level hyperfine interaction constant derived from level splitting is +89±5 MHz. An equivalent collimation ratio of 9 mrad is estimated for the expanding pulsed atomic beam. We propose that laser ablation of selected targets provides a unique source of neutral or ionic ground-state atoms and molecules for spectroscopic studies. Details of these experiments are discussed and analyzed. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.361420
Permalink
Library |
Location |
Call Number |
Volume/Issue/Year |
Availability |