A Mossbauer experiment in a rotating system on the second-order Doppler shift: confirmation of the corrected result by Kundig

Abstract

We present the results of a Mossbauer experiment in a rotating system, whose performance was stimulated by our recent findings (2008 Phys. Scr. 77 035302) and which consisted of the fact that a correct processing of Kundig's experimental data on the subject gives an appreciable deviation of a relative energy shift Delta E/E between emission and absorption resonant lines from the standard prediction based on the relativistic dilation of time (that is, Delta E/E = -v(2)/2c(2) to the accuracy c(-2), where v is the tangential velocity of the absorber of resonant radiation, and c is the velocity of light in vacuum). That is, the Kundig result we have corrected becomes Delta E/E = -k(v(2)/c(2)), with k = 0.596 +/- 0.006 (instead of the result k = 0.5003 +/- 0.006, originally reported by Kundig). In our own experiment, we carried out measurements for two absorbers with a substantially different isomer shift, which allowed us to make a correction of the Mossbauer data regarding vibrations in the rotor system at various rotational frequencies. As a result, we obtained the overall estimation k = 0.68 +/- 0.03.