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Abstract

The energy and mass distributions and their correlations have been studied for the spontaneous fission of 240-Pu and the thermal neutron induced fission of 239-Pu. A comparison of the 240-Pu(sf) and the 239-Pu(n-th,f) results show a narrower mass distribution, a much higher peak yield, a much lower symmetric fission yield, and a more pronounced fine structure for the spontaneous fission than for the neutron induced fission. The average total kinetic energy is 1.3 MeV higher for 240-Pu(sf) than for 239-Pu(n-th,f), and also the energy-mass correlations behave differently in both cases. All these results are discussed and interpreted in the framework of the scission point model of Wilkins et al. Finally, the damping of the 240-Pu fission mode below the barrier is demonstrated.

Additional information

Authors: WAGEMANS C, SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM);ALLAERT E, SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM);SCHILLEBEECKX P, SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM);DERUYTTER A, SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM);BARTHELEMY R SCK/CEN, MOL (BELGIUM), SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM);JRC GEEL ESTAB. (BELGIUM), SCK/CEN, MOL (BELGIUM);JRC GEEL ESTAB. (BELGIUM)
Bibliographic Reference: PHYSICAL REVIEW C, VOL. 30 (1984), NO. 1, PP. 218-223
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