Eliade Stefanescu - Giant resonances as collective states with dissipative coupling

Version 1

      Publication Details (including relevant citation   information):

      Phys. Rev. C 57 (1998) 798.


      We describe giant resonances as the collective coordinates of a   harmonic  oscillator with dissipative coupling. Using a   quantum master equation,  the energy and width of the first   two levels are obtained as functions  of temperature and of   the dissipative coupling strength. On this basis,  we   evaluate the ratio of the two spectral linewidths. The result   agrees  with available experimental data. We evaluate   transition matrix elements  among particle excitations   belonging to the environment and find a weak  dependence on   temperature.

      Address (URL): http://prc.aps.org/abstract/PRC/v57/i2/p798_1