Experimental Test of Laporte's Rule In Atomic Hydrogen

Abstract

An experiment has been performed with atomic hydrogen which yields an upper limit on an intrinsic violation of Laporte's rule. This limit, expressed in terms of mixing of the $2S_{\frac{1}{2}}-2\mathrm{}{P}_{\frac{1}{2}}$ parity doublet, is 1.5×${10}^{-8\mathrm{}}$.