Successive Transformations in Nuclear Fission

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Abstract
If it be assumed that fission of heavy nuclei takes place in competition with the escape of a neutron from the highly excited compound system, we should expect that, for sufficiently high excitation of the system, fission of the residual nucleus left after neutron escape may still occur. Since, in this second stage of the process, the conditions for the competition with neutron escape are in several cases more favorable than in the first stage, such effects may give rise to much increased cross sections for the fission process.