Fusion cross section of $^{3}$He$(\alpha,\gamma)^{7}$Be

The $^3$He$(\alpha, \gamma)^7$Be reaction is important for the neutrino production in the sun's core and the production of $^7$Li during the big bang nucleosynthesis. Due to the low level density of $^7$Be, the reaction mechanism is dominated by a strong direct capture component at the relevant energies. Recent experiments have improved the uncertainty of the reaction but some discrepancies still exist. In the present work, a relatively wide energy window was measured, $E_{CM} = 0.300-1.450$ MeV, by detecting the prompt gamma-rays from the reaction. The experiments were carried out at the Nuclear Science Laboratory, University of Notre Dame and utilized a compact helium jet gas target (HIPPO) to ensure a sufficiently high gamma-ray detection efficiency. The results are compared with literature.