Deuteron optical model calculations including a Tp tensor interaction

An inversion procedure for coupled-channel scattering: determining the deuteron-nucleus tensor interaction

“…The non-tensor components are qualitatively well reproduced, the derived potentials having the appearance of the target potentials but with superimposed oscillations. This waviness is relatively more significant for the small components, the real central potential being reproduced to within a few percent for all r. The T R interaction found by inversion is now surface peaked in form but of average depth comparable to that of the Woods-Saxon (which however had a local momentum dependence, see [30]). The diagonal S J l ′ l for target and inverted potentials are graphically indistinguishable, as are arg S J l ′ l for l = l ′ for low values of J.…”

“…The properties and even existence of a T P interaction have not yet been convincingly linked to experiment since the consequences of the two kinds of interaction are difficult to distinguish phenomenologically. This was discussed by Goddard [30] who compared S J l ′ l and the observables calculated from a T R interaction with the corresponding quantities calculated from a particular T P interaction devised in such a way that, according to semi-classical arguments, it would be very similar in effect.…”

“…2. As Goddard suggested, almost all the effects of such a potential can be well represented by a T R tensor interaction, although its relationship to the form of the T P interaction is, as might be expected, more complicated than can be deduced from simple semiclassical arguments [30]. The phenomenological problem of establishing T P interactions is still considerable.…”

Nuclear Physics with Polarized Beams

“…The magnitude of Tr varies but often is about 1.0 MeV ; with a second-derivative shape approximately the same as fo lding-model pre dictions, the radius parameter seems to be larger than the radius of the nucleus. Little work has been done with Tp at these energies ; Goddard (1977) showed that its effects are almost indistinguishable from the effects of Tr unless the bombarding energy is much larger. The potential h is expected theoretically to be very small, and the few analyses are consistent with this expectation.…”