Energy-shell contributions of the three-particle-three-hole excitations.
نویسندگان
چکیده
The response functions for the extended second and third random phase approximation are compared. A second order perturbation calculation shows that the first-order amplitude for the direct 3p3h excitation from the ground state cancels with those that are engendered by the 1p1h-3p3h coupling. As a consequence nonvanishing 3p3h effects to the 1p1h response involve off energy shell renormalization only. On shell 3p3h processes are absent. † Fellow of the CONICET from Argentina.
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ورودعنوان ژورنال:
- Physical review. C, Nuclear physics
دوره 49 4 شماره
صفحات -
تاریخ انتشار 1994