Threshold Photoneutron Cross Sections for 26Mg
ORAL
Abstract
The $^{22}$Ne$(\alpha,n)^{25}$Mg reaction rate is of critical importance for the calculation of the available neutron flux in s-process nucleosynthesis scenarios. The precision of the reaction rate is mainly hampered by the limited knowledge of the resonances near the neutron separation energy of $^{26}$Mg ($S_n$=11.093 MeV). The HI$\gamma$S facility offers a unique possibility for studying these resonances via the $^{26}$Mg$(\gamma,n)^{25}$Mg reaction. Preliminary results are presented for neutron measurements using both a high efficiency, nearly 4$\pi$, $^3$He neutron detector setup and a time of flight setup using nine liquid scintillator detectors.
*This work was funded by the National Science Foundation through Grant No. Phys-0758100, and the Joint Institute for Nuclear Astrophysics Grant No. Phys-0822648.
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