Differential cross sections for the double-isobaric-analog-state transition in the 42,44Ca(+,-) reactions were measured at an incident energy of 35 MeV and 40 degrees. The Ca42 cross section (2.0±0.5 b/sr) is nearly as large as those of the lighter T=1 nuclei and only slightly smaller than that previously measured for Ca48 (2.4±0.7 b/sr). The cross section for Ca44 (1.1±0.3 b/sr) is half of this amount. These results are surprising when compared with simple expectations and point to the importance of the nonanalog route contribution at low energies.
ASJC Scopus subject areas
- Nuclear and High Energy Physics