Scattering of Deuterons in Helium

The scattering of deuterons in helium gas has been investigated at three angles in the energy range 1000 to 1200 kev. A pronounced resonance appears at $E_d=1069\mathrm{}$ kev, of width 35 kev (lab), which corresponds to the 2.187-Mev level of ${\mathrm{Li}}^6$. It is established that the level in question has $J=3\mathrm{}$, even parity, and a reduced width of the order of the single-particle limit. The best fit to the observations is obtained with a channel radius of 4.0×${10}^{-13\mathrm{}}$ cm, taking into account the effect of the ground state, $J=1^{+}$, which is assumed to have the same reduced width. A brief search, carried out at only one angle, revealed no further levels below $E_d=2.0\mathrm{}$ Mev.