Two-level model for decay out of a superdeformed band

Barrett, Bruce R.; Stafford, Charles A.
July 2000
AIP Conference Proceedings;2000, Vol. 529 Issue 1, p512
Academic Journal
Since the discovery of superdeformed bands in nuclei, physicists have been challenged to understand the decay-out mechanism. Presently two theories exist for describing the decay-out intensity from the superdeformed band. These theoretical investigations yield qualitatively different results, depending upon the relative values of the relevant decay widths. We present a simple two-level model for the dynamics of the tunneling between the superdeformed and the normal-deformed bands, which treats the decay and tunneling processes on an equal footing. We find that the previous theoretical results correspond to coherent and incoherent limits, respectively, of the full tunneling dynamics. Our model accounts for experimental data in both the A∼150 mass region (coherent tunneling) and the A∼190 mass region (incoherent tunneling). © 2000 American Institute of Physics.


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