engleski

Double giant resonances in time-dependent relativistic mean-field theory

Collective vibrations in spherical nuclei are described in the framework of time-dependent relativistic mean- field theory (RMFT). Isoscalar quadrupole and isovector dipole oscillations that correspond to giant resonances are studied, and possible excitations of higher modes are investigated. We find evidence for modes which can be interpreted as double resonances. In a quantized RMFT they correspond to two-phonon states.

time-dependent relativistic mean-field theory ; giant resonances

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