E1-M1 Damping Interference in the Electric Field Quenching of Metastable Ar171 Ions
نویسندگان
چکیده
S. Cheng and L. J. Curtis Department of Physics and Astronomy, University of Toledo, Toledo, Ohio 43606 (Received 7 July 1997) We have confirmed the prediction of a pseudo-time-reversal-odd anisotropy proportional to $ E ? k̂ in the decay of metastable s2s1y2d Ar171 ions in an electric field $ E, where k̂ is the direction of observation. The anisotropy arises from interference between the M1 and induced E1 amplitudes for the decay. Theory predicts that the pseudo-T-odd invariant should contribute to the angular distribution through a term associated with the damping (finite lifetime) of the 2p levels. The decay rate for the interference term is found to be 21.64s0.12d s21 sr21 sVycmd21. This corresponds to a 2s Lamb shift for Ar171 of 38.6(1.4) THz. [S0031-9007(97)04308-1]
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