Non-Local Interactions For the Deuteron Using Spherical Bessel Functions

Non-local interactions are assumed for the deuteron with form factors $g_C(k)= j_0(b_1k)\,j_0(b_2k)$ for the central part responsible for the S-state and $g_T(k)= j_1(b_1k)\,j_1(b_2k)$ for the tensor part responsible for the D-state, where $b_1$ and $b_2$ are range parameters for the proton and neutron, respectively. The analytically obtained wavefunctions in coordinate space have different forms in three different regions. The inner most region is between $r=0$ and $r=b_2-b_1$ (assuming $b_2>b_1$), followed by a region between $r=b_2-b_1$ and $b_1+b_2$ and finally the region $r>b_1+b_2$. The resulting wavefunctions and their derivatives are found to be continuous at the boundaries. The ensuing calculations are simplified by setting $b_1=b_2=b$. Good agreement is obtained for the quadrupole moment. Neutron-proton scattering calculations will follow in the next communication.