double-hump fission barrier

double-hump fission barrier

[¦dəb·əl ‚həmp ′fish·ən ‚bar·ē·ər]
(nuclear physics)
Two separated maxima in a plot of potential energy against nuclear deformation of an actinide nucleus, which inhibit spontaneous fission of the nucleus and give rise to isomeric states in the valley between the two maxima.