PPT Slide
Some Terminology in DWBA Transfer Reaction Theory
The finite size of the volume where transfer occurs is not taken
into account (as it is in full finite range calculations)…
this is often a reasonable approximation for light ion induced reactions
If the interaction potential is assumed to have terms beyond a simple
radial dependence, then non-locality effects/corrections are included
We have presented the so-called “post” form of the DWBA formulation
that is usually used when the nucleon is transferred away from the
lighter particle (traditionally, stripped from the projectile). It is called
“post” because the exit channel interaction was approximated by
the optical potential. For pickup, the prior form is usually used.
Is precisely defined, and is essentially the fraction of the wavefunction
for the transferred nucleon that comprises the pure single particle state
The calculation goes beyond the single-step processes that we have
discussed, and includes processes through intermediate states - two
or more paths to the same final state may interfere coherently
The multiple steps can go in both directions, giving coupled
equations. e.g. when collective excitation accompanies transfer
When continuum channels need to be considered, e.g. deuteron
breakup, 6 Li breakup. Explicit computational methods include
discretized continuum coupled channels (DCCC). For deuteron
coupling, see R.C.Johnson and P.J.R.Soper Phys Rev C1 (1970) 976.