Nuclear Fermi motion effect on pion double charge exchange - Ching, C.-R.; Ho, T.-H.; Zou, B.-S.; Chiang, H.-C. (Elsevier)
The influence of nuclear Fermi motion on the conventional mechanism of pion double charge exchange (DCX) is examined. Concrete calculations of the 0^o excitation function over the energy region 0-300 MeV are performed for the double-isobaric-analog-state (DIAS) DCX transition on ^1^4C. The calculated results coincide very well with the experimental data for energies above 100 MeV, but are about a factor of 2 smaller than the experimental data around 50 MeV. It indicates that the pure conventional mechanism seems incapable to explain fully the anomalous behavior of the low-energy DCX, and some new mechanisms are needed.
http://linkinghub.elsevier.com/retrieve/pii/0370-2693(90)90860-9
Keywords: U