Comprehensive Evidence of Octupole Vibration in ¹⁵⁸Gd

Comprehensive evidence of the SU(3) octupole vibration limit in the spdf interacting boson model is found in the spectrum, E2 and El transition rates, and relative intensities in ¹⁵⁸Gd. This is a good example of a rotational nucleus with octupole vibration in the rare-earth region.