CNO cycle: "Soft E1" mode of the ¹⁷Ne excitation in the ¹⁷Ne+γ → ¹⁵O+2p reaction

The ¹⁵O(2p, γ)¹⁷Ne reaction is studied using the time-reversed reaction of the¹⁷Ne E1 Coulomb dissociation on lead target in the context of nuclear astrophysics. Looking for the relation between the data on the Coulomb excitation and the astrophysical 2p-capture rate, one faces problem to extract the Coulomb E1 strength function from the measured Coulex cross section. We use a number of phenomenological approaches to estimate influence of such processes as Coulomb-nuclear interference, populations of states with different J^π, etc. We calculate the ¹⁷Ne+2p astrophysical capture rate and compare the results with different calculations. (paper)