Abstract
The strength functions fore + e − pair decay of the isoscalar and isovector giant monopole resonances in highly excited nuclei are derived and used in a statistical model calculation of thee + e − pair energy spectrum from compound nuclear decay in110Sn following a fusion evaporation reaction. This result is then compared to thee + e − spectrum derived from internal pair decay of the giant dipole and giant quadrupole resonances. The computation shows that the pair decay from the excited-state GDR dominates the pair spectrum over the region of all giant resonances, exceedingL=0 transitions by at least a factor of ten. We also compute the angular correlations betweene + ande − for theL=0, L=1 andL=2 transitions and estimate their power to discriminate between the various multipolarities.
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