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Recent fission studies at IRMM were both theoretical and experimental. The multi-modal random neck-rupture model of Brosa et al. has given new insights into the fission process and provided an instrument for experimentalists to interpret data. At IRMM the programs to calculate the fission modes of any compound system have been used in the calculation of 238Np and 252Cf. For 238Np a complete fission channel picture from ground-state to the scission point has been achieved. In total four fission channels have been found, three standard and one superlong channel. For the first time the standard III-channel can be theoretically confirmed. For 252Cf more channels are expected from the analysis of the experimental data than predicted earlier. In both cases experimental studies have been performed. For 237Np(n,f) the incident neutron energy has been varied from 0.5 MeV to 5.5 MeV, so that the data can be compared to other existing results. For 252Cf(sf) about 2.5 x 1.0 E8 events have been acquired.

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Authors: SIEGLER P, JRC Geel (BE);HAMBSCH F-J, JRC Geel (BE);VAN AARLE J, JRC Geel (BE);THEOBALD J P, Technische Hochschule Darmstadt (DE)
Bibliographic Reference: Paper presented: Second International Conference on Dynamical Aspects of Nuclear Fission, Smolenice (CS), June 14-18 (1993)
Availability: Available from (1) as Paper EN 37481 ORA
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