Multipole decomposition of theO16(p,n)16<

Nucleon Charge-Exchange Reactions at Intermediate Energy

“…However, with the development of facilities for intermediate energy (n,p) measurements beginning at TRIUMF in 1986, it has become possible to measure some of these strength distributions and so test the validity of the earlier models. In the (2p1f) shell, measurements of GT + strength have been reported for 45 70,72 Ge [157]. Calculations of electron capture rates using some of these new results have been carried out and compared with results of earlier calculations [158,159].…”

“…The magnitude of the cross section depends on these inputs, but the characteristic shape of the angular distributions, i.e., the location and width of the primary peak, is not significantly sensitive to reasonable variations in either optical potentials or effective interaction. The effects of such changes are illustrated in [45]. On the other hand, details of the distributions are affected; in particular the magnitude of the cross section at 0 o for transitions with L > 0 is sensitive to distortions in the scattering channels, i.e., the optical potentials.…”

“…Although this system provided some interesting results [45,46] it has now been decommissioned and the detectors are being used at IUCF.…”

“…The problem of determining GT strength in this situation is often approached through a multipole decomposition analysis (MDA). The essential ideas behind such an analysis have been discussed by Moinester [174], and typical applications are illustrated in a number of data analyses, both for (p, n) [45,53,148] and (n,p) reactions [52,156,175].…”

“…For all these comparisons except 42 Ca and 45 Sc, the calculations must be renormalized by a factor of about 0.3 as a result of the truncation of the model space.…”