Two-Nucleon Problem When the Potential Is Nonlocal but Separable. II

The two-nucleon problem is considered in terms of an interaction of the form $\left(\mathrm{p}\mathrm{}\right|V\left|\mathrm{}{\mathrm{p}}^{\prime }\right)=-\left(\frac{\lambda }{M}\right)g\left(\mathrm{p}\right)g\left({\mathrm{p}}^{\prime }\right)$, with $g\left(\mathrm{p}\right)=C\left(p\right)+\left(\frac{1}{\surd 8}\right)\left\{3\mathrm{}{p}^{-2\mathrm{}}\right({\sigma }^p·\mathrm{p}\left)\right({\sigma }^n·\mathrm{p})-({\sigma }^p·{\sigma }^n\left\}T\right(p)\mathrm{}$, where the second term gives rise to a mixture of $D$ state with the $S$ state determined by the first term. After deriving general results valid for any form of $g\left(\mathrm{p}\right)$, we discuss in detail the special case of $C\left(p\right)={(p^2+{\beta }^2)}^{-1\mathrm{}}$ and $T\left(p\right)=-t{p}^2{({\gamma }^2+p^2)}^{-2\mathrm{}}$ and compared it with observed data. The photodisintegration of the deuteron is also discussed and it is found that the $D$-wave part of the deuteron plays an important role at high photon energies leading to a larger cross section than given by other calculations to date.