Elastic scattering of alpha particles from helium

The scattering of alpha particles from He4 has been studied for laboratory energies between 3.8 and 12 MeV. Ten angular distributions have been measured over this range of energies as well as excitation curves at the center-of-mass angles 30.6°, 40°, 54.8°, 70.2°, and 90°. A phase-shift analysis of these data has been made and is compared to previously published results

A study of d-He4 elastic scattering

NOTE: Text or symbols not renderable in plain ASCII are indicated be [...]. Abstract is included in .pdf document. Angular distributions [...] of He[superscript 4](d,d)He[superscript 4] have been obtained, using a gas scattering chamber, for deuteron bombarding energies from 2.935-11.475 MeV at half-MeV intervals. A lithium drafted solid-state detector was used to detect the scattered deuterons and recoil alpha particles. The phase shift and single level analyses performed with the data result in energy levels in Li[superscript 6] at excitation energies of E[subscript x] = 4.57, 4.62 and 7.19 MeV, and have respective J[superscript pi] assignments of 2[superscript +], 1[superscript +] and 1[superscript -]. There is a great degree of confidence in the assignments for the first two levels; however, further analysis is necessary to confirm the assignments to the third level