Fast-Beam Laser Spectroscopy of Helium-like Ions
Abstract
Laser spectroscopy on fast, foil-stripped ion beams can provide precision tests of QED corrections(E.G. Myers et al., Phys. Rev. Lett. 75), 3637 (1995)., fine structure and hyperfine structure(E.G. Myers, D.J.H. Howie, J.K. Thompson and J.D. Silver, Phys. Rev. Lett. 76), 4899 (1996). and isotope shifts in helium-like ions. Precision fine structure measurements in helium-like ions are of particular current interest in that they can be used to test higher-order corrections to calculations of the fine structure of helium, which will be used to obtain a new ``atomic physics value'' for the fine structure constant(T. Zhang, Z.-C. Yan and G.W.F. Drake, Phys. Rev. Lett. 77), 1715 (1996).. Our apparatus for the measurement of the 1s2s ^1S0 - 1s2p ^3P_1,^3P0 intervals in N^5+ using a CO2 laser has been improved to allow the scanning of resonances with counter-propagating laser beams. The status and prospects for improvement of our measurements in ^14,15N^5+, and also of a remeasurement of the 2^3P2 - 2^3P1 fine structure in ^19F^7+, will be presented.
- Publication:
-
APS April Meeting Abstracts
- Pub Date:
- April 1997
- Bibcode:
- 1997APS..APR.E1306M