LABORATORI NAZIONALI DEL SUD
In this report, the explicit expression for the NVC (or ANC) for the virtual decay B -A + a an arbitrary orbital momentum l and the corresponding connection equation for the bound (A+alfa) state, which are valid both for the neutral case and for the charged case, are discussed for the standard effective-range expansion Kl(k2) restricting by terms up to k6. Combining this expression and the bound state condition with the standard effective-range function makes it possible one to reduce the number of the free effective range parameters on two if the "experimental" ANC-value is known. The new experimental values for the scattering length, effective range and parameter form are determined in this way for the 16O+p, alfa+t and alfa+3He collisions by using the available corresponding "experimental" ANC. It is shown that the effective-range expansion for these collisions is valid up to energies larger 5 MeV.

DATA: 13-07-2012