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VOLUME 53 (1991) | ISSUE 8 | PAGE 385
Estimate of the lifetime of massive nuclear-unstable fission fragments of 238U nuclei split by 1-GeV protons
The momentum spectra of complementary fragments from splitting of U nuclei were measured with collinear and noncollinear separation of the fragments for events with large nucleon losses. The change in the momentum distributions on going from the collinear to the noncollinear geometry is employed to estimate the lifetime of the massive nuclear-unstable fragments.