Study of the ${}^2$H(p,$\gamma$)${}^3$He cross section at E${}_p$ = 400 - 800 keV

The production of deuterium during Big Bang Nucleosynthesis (BBN) marks a crucial step for the nucleosynthesis of light elements. Presently, the precision of the Big Bang abundance prediction of ${}^2$H is limited by the uncertainty of ${}^2$H destruction by the ${}^2$H(p,$\gamma$)${}^3$He reaction. The poor knowledge of the ${}^2$H(p,$\gamma$)${}^3$He cross-section in the BBN energy window is limiting further cosmological conclusions from highly accurate deuterium abundance. The present contribution reports on an experimental study of the ${}^2$H(p,$\gamma$)${}^3$He cross - section at energies of E${}_p$ = 400 - 800 keV, complementary to an ongoing study of the same reaction deep underground at LUNA at lower energy, E${}_p$ = 50 - 400 keV. The data have been taken at the 3 MV Tandetron accelerator of HZDR with deuterated titanium targets.