NUCLEAR ELECTROMAGNETIC RESPONSE WITHIN CONTINUUM RPA THEORY

The longitudinal and transverse components of the nuclear electromagnetic response are studied taking into account continuum particle-hole rescattering processes. Finite range forces, including a tensor force, are used with an explicit inclusion of exchange terms. A new formalism, based on Sturmian functions, is developed which allows efficient treatment of such effects. An extended numerical analysis is performed for 12C. The importance of continuum rescattering and exchange is demonstrated up to high momentum transfers. In particular, the tensor force strongly influences the transverse response via forward- and backward-going contributions. © 1991.