Abstract

The study of weak interactions in atoms started soon after the discovery of parity nonconservation PNC [1]. Its small size remained a challenge, but the Bouchiats [2] recognized that in an appropriate interference experiment the size of the effect of atomic parity noncon servation (APNC) scales faster than Z3, with Z the atomic number. This strong scaling has made possible not only to observe PNC effects in atoms, but to measure weak interaction coupling constants, at very low energies.

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