Abstract
The cross section for the 2H(p,$\gamma$)3He reaction was measured in the energy range E = 47–210 keV, relevant for primordial nucleosynthesis. A proton beam was incident on two deuterated titanium targets. The angular distribution of emitted $ \gamma$-rays was determined using two HPGe detectors, placed at $ 90^{\circ}$ and $ 135^{\circ}$ with respect to the incident beam direction. Results were compared with the latest ab initio theoretical calculation, including one- and many-body contributions. The predicted cross section and astrophysical S-factor are found to be in a very good agreement with measured values.
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