Analysis of exchange terms in a projected extended random phase approximation theory applied to the quasielastic „e ,e8... reaction
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چکیده
A systematic study of the influence of exchange terms in the longitudinal and transverse nuclear response to quasielastic (e ,e8) reactions is presented. The study is performed within the framework of the extended random phase approximation, which in conjuction with a projection method permits a separation of various contributions tied to different physical processes. The calculations are performed in nuclear matter up to second order in the residual interaction for which we take a (p1r) model with the addition of the LandauMigdal g8 parameter. Exchange terms are found to be important only for the random-phase-approximationtype contributions around the quasielastic peak. @S0556-2813~98!02508-4#
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تاریخ انتشار 1998