In-medium two-nucleon properties in high electric fields

Дата и время публикации : 1996-02-09T15:28:52Z

Авторы публикации и институты :
K. Morawetz (AG “Theoretische Vielteilchenphysik” an der Universität Rostock, Rostock, Germany)
G. Röpke (AG “Theoretische Vielteilchenphysik” an der Universität Rostock, Rostock, Germany)
Max-Planck-Gesellschaft (AG “Theoretische Vielteilchenphysik” an der Universität Rostock, Rostock, Germany)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: ps file + 7 figures (eps)
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: The quantum mechanical two – particle problem is considered in hot dense nuclear matter under the influence of a strong electric field such as the field of the residual nucleus in heavy – ion reactions. A generalized Galitskii-Bethe-Salpeter equation is derived and solved which includes retardation and field effects. Compared with the in-medium properties in the zero-field case, bound states are turned into resonances and the scattering phase shifts are modified. Four effects are observed due to the applied field: (i) A suppression of the Pauli-blocking below nuclear matter densities, (ii) the onset of pairing occurs already at higher temperatures due to the field, (iii) a field dependent finite lifetime of deuterons and (iv) the imaginary part of the quasiparticle self-energy changes its sign for special values of density and temperatures indicating a phase instability. The latter effect may influence the fragmentation processes. The lifetime of deuterons in a strong Coulomb field is given explicitly.

Category: Physics