Ca40(d, p)Ca41, a Test of the Validity of the

Abstract

The reaction Ca 4O 0,£)Ca 41 has been studied at deuteron energies of 7.0, 8.0, 9.0,10.0,11.0, and 12.0 MeV. Absolute differential cross sections for the four most prominent proton groups were measured and are compared with predictions based on the distorted-wave Born approximation (DWBA). Particular emphasis is placed on the ability of this approach to extract precise spectroscopic factors, which for this reaction are expected to be known a priori. Effects of variation of optical parameters, and of inclusion of spin-orbit and finite-range effects, are discussed in detail. It can be concluded that, if one uses optical potentials which fit elastic-scattering data, spectroscopic factors can be extracted with an accuracy of 20% or better. 4 Y.

Coupled-Channel Calculations for Nuclear Bound States

“…The Ca isotopes have been extensively studied by stripping 30 and pickup 31 reactions and strong singleparticle (hole) levels in Ca 41 (Ca 39 ) are well described by a spherical shell model and a DW analysis. 32 On the other hand, weaker low-lying levels of the "wrong" parity have been observed 33,34 and are very important in determining the extent of collective admixtures in the ground state of Ca 40 . The strongest of these levels are the |~ (2.80-MeV) level in Ca 39 and the f+ (2.02-MeV) level in Ca 41 , neither of which fits into a simple shellmodel description.…”

Ca40(d,d), (dNiewodnicźański1, Nurzyński2, Strzalkowski3 et al. 1966Phys. Rev.Self Cite32150View full textAdd to dashboardCite

“…12 For the analysis of the present data, the deuteron optical potentials described in Sec. IIA were used, but the proton optical potential and the shellmodel potential into which the neutron is captured were taken to be the same as in Ref.…”

Neutron Spectroscopic Factors from Transfer Reactions

“…Detailed comparisons of the angular distribution data show essentially the same effect, that the differential cross-sections measured in ref. [181] are systematically higher than the other measurements [30,178,[182][183][184][185][186][187][188][189][190][191]. Clearly, there must be some problems in the determination of the absolute cross-sections in ref.…”

“…[181] (open circles) are consistently larger than the spectroscopic factors extracted from different experiments with the same reaction at the same energy. Detailed comparisons of the angular distribution data show essentially the same effect, that the differential cross-sections measured in ref.…”

“…[21], [45], [59] and [30] respectively. [181] (open circles) and from other measurements (closed circles). The increase of spectroscopic factors observed at E d <10 MeV has been observed before [21] and has been attributed to the resonance structures in the elastic scattering of the deuterons [244].…”