$^{92}$Mo($α,α$)$^{92}$Mo scattering,the $^{92}$Mo--$α$ optical potential, and the $^{96}$Ru($γ,α$)$^{92}$Mo reaction rate at astrophysically relevant energies

Astronomy and Astrophysics – Astrophysics

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accepted for Physical Review C

Scientific paper

10.1103/PhysRevC.64.065805

The elastic scattering cross section of$^{92}$Mo($\alpha$,$\alpha$)$^{92}$Mo has been measured at energies of $E_{\rm{c.m.}} \approx$ 13, 16, and 19 MeV in a wide angular range. The real and imaginary parts of the optical potential for the system $^{92}$Mo - $\alpha$ have been derived at energies around and below the Coulomb barrier. The result fits into the systematic behavior of $\alpha$-nucleus folding potentials. The astrophysically relevant $^{96}$Ru($\gamma$,$\alpha$)$^{92}$Mo reaction rates at $T_9=2.0$ and $T_9=3.0$ could be determined to an accuracy of about 16 % and are compared to previously published theoretical rates.

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