H2(H2,dp)nReaction

The $d+d\to d+p+n$ breakup reaction was studied over a range of bombarding energies $E_d=14\mathrm{}-36$ MeV. The proton and deuteron were detected at angle pairs chosen to either emphasize quasifree scattering (QFS) or the $n-p$ final-state interaction (FSI). It was found that by using a smooth cutoff for the deuteron wave function, a modified plane-wave impulse-approximation (PWIA) theory could fit the magnitude and shape of the observed QFS peaks. To fit the QFS plus FSI data only triplet FSI was needed in contrast to some earlier results that indicated a strong singlet FSI. The singlet FSI contribution to the cross sections was estimated to be less than 1% in all cases studied.