Project of photoassociative measurements for determination of the density shift of the1S0−3P0 clock transition in neutral strontium

We present a proposal of determination of the density shift of the ¹S₀-³P₀ clock transition in neutral cold strontium atoms. Since the direct use of the double forbidden, intercombination clock transition (698 nm) may be difficult we propose to use a three photon photoassociation. The measurement will be performed with the magneto-optical trap set-up designed for the experiments with both ⁸⁸Sr and ⁸⁷Sr isotopes.