Measurement of highly excited states in ${}^9B$ for Big Bang Nucleosynthesis

The relative abundance of ${}^7Li$ to Standard Big Bang Nucleosynthesis (SBBN) calculations remains one of the major questions about the formation of the light elements. SBBN overestimates the abundance by a factor of 3 to 4, therefore channels of mass-7 destruction must be investigated. Of particular interest is the ${}^7Be+d \rightarrow {}^9B$ reaction channel, where the compound nucleus ${}^9B$ is unstable and decays to $2\alpha + p$. Using the ${}^{10}B({}^3He, \alpha){}^9B$ reaction with the Super Enge SplitPole Spectrograph (SESPS) at Florida State University, a high resolution measurement of the excited states in ${}^9B$ at BBN relevant energies was performed to better understand this system. The ${}^9B$ decay products were detected in coincidence by the Silicon Array for Branching Ratio Experiments (SABRE). Results and impact on BBN will be discussed.