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Pre-scission neutron multiplicity associated with the dynamical process in superheavy mass region

Y. Aritomo·M. Ohta·F. Hanappe
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Abstract

The fusion-fission process accompanied by neutron emission is studied in the superheavy-mass region on the basis of the fluctuation-dissipation model combined with a statistical model. The calculation of the trajectory or the shape evolution in the deformation space of the nucleus with neutron emission is performed. Each process (quasi-fission, fusion-fission, and deep quasi-fission processes) has a characteristic travelling time from the point of contact of colliding nuclei to the scission point. These dynamical aspects of the whole process are discussed in terms of the pre-scission neutron multiplicity, which depends on the time spent on each process. We have presented the details of the characteristics of our model calculation in the reactions $^{48}$Ca+$^{208}$Pb and $^{48}$Ca+$^{244}$Pu, and shown how the structure of the distribution of pre-scission neutron multiplicity depends on the incident energy.

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Y. Aritomo, M. Ohta, F. Hanappe. 2006-09-25. Pre-scission neutron multiplicity associated with the dynamical process in superheavy mass region. https://doi.org/10.1088/0954-3899%2F32%2F11%2F016

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