G. Viesti et al., Observation of a double giant dipole resonance in fusion-evaporation reactions - art. no. 034611, PHYS REV C, 6303(3), 2001, pp. 4611
The emission of two coincident energetic (E greater than or equal to8 MeV)
gamma rays has been observed in the 187 MeV Cl-37 + Sn-120 reaction by usin
g the cluster detectors of the EUROBALL III array. Those events are attribu
ted to the decay of the double giant dipole resonance built on highly excit
ed states.