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

Abstract

The elastic scattering cross section of${}^{92}$Mo($\alpha$,$\alpha$)${}^{92}$Mo has been measured at energies of $E_{c.m.}\approx$ 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.

accepted for Physical Review C

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