Test der Zeitumkehrinvarianz der elektromagnetischen Wechselwirkung am 73 keV-γ-Übergang von¹⁹³Ir

Abstract

In order to test the time-reversal invariance of the electromagnetic interaction of nucleons the phase angle η between theE2- andM1-matrix-elements of the mixed$\frac{1}{2}^ + - \frac{3}{2}^ +$-transition in¹⁹³Ir has been measured in a Mössbauer experiment. In a measurement which avoids possible systematic errors the sine of the phase angle which is proportional to the time-reversal odd part of the transition matrix element has been deduced. The value is sinη=M _odd/M _even=(1.6±2.4) · 10⁻³. In accordance with the results of other experiments there is no evidence for a strong violation of time-reversal invariance in the electromagnetic interaction as postulated by Bernstein, Feinberg, and Lee.