Time evolution of the fission-decay width under the influence of dissipation

Different analytical approximations to the time-dependent fission-decay width used to extract the influence of dissipation on the fission process are critically examined. Calculations with a new, highly realistic analytical approximation to the exact solution of the Fokker–Planck equation sheds doubts on previous conclusions on the dissipation strength made on the basis of less realistic approximations.

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