Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 17: Posters Friday (Spectroscopy)
A 17.27: Poster
Freitag, 6. April 2001, 12:30–15:00, AT3
Preparatory measurements for a new test of the time dilation factor — •Guido Saathoff1, Gerald Gwinner1, Gerhard Huber2, Sergej Karpuk2, Dirk Schwalm1, Matthias Weidemüller1, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, D-69117 Heidelberg — 2Institut für Physik, Universität Mainz, D-55099 Mainz
The comparison of the transition frequency of an ion at two different
velocities measured by
collinear laser spectroscopy of an ion beam provides a test of the
relativistic Doppler formula and, therefore, the time dilation
factor γ. Possible deviations from γSR predicted by
the theory of special relativity are parametrized,
e.g. in the test theory by Mansouri and Sexl [2], through γ =
γSR(1+α β2+...).
Previous measurements at the TSR storage ring in Heidelberg used a beam
of metastable 7Li+ ions at β =0.065 .
The achieved total accuracy of 3 MHz (Δν/ν=9×
10−9), together with the ions rest-frame frequency [3], resulted in an
upper limit for α of 8× 10−7 [1].
Experimental investigations are presently being performed to further
minimize systematic errors in preparation of
a new improved 7Li+ experiment
at the TSR. Here the transition frequency is planned to be
measured at two finite, but sufficiently distinct velocities β =
0.065 and β = 0.029,
respectively, with an accuracy well below 1 MHz.
[1] R. Grieser et al., Appl. Phys. B59, 127 (1994).
[2] R. Mansouri, R. U. Sexl, Gen. Rel.
Grav. 8(7), 497 (1977).
[3] E. Riis et al., Phys. Rev A 33, 3023 (1986).