JAEA-Conf 2011-002 - 日本原子力研究開発機構

4. Conclusions
We have compared nucleon-induced pre-equilibrium production of light complex particles with the twocomponent
EM complemented by the Kalbach systematics. We observed that the large overestimation of the
production of composite particles could be reduced introducing a new energy dependence in the NT contribution
to the EM. These results are consistent in both proton-induced and neutron-induced data. However, reducing the
NT contribution to the pre-equilibrium emission leads to an underestimation of the production of light complex
particles in the low energy emission region. We explain this underestimation in terms of multiple pre-equilibrium
emission and suggest this mechanism to be included, also for complex particles, in future releases of the TALYS
code.
We have also presented the first preliminary results of QMD calculations in comparison with recent neutron
induced data at quasi-monoenergetic 175 MeV. QMD underestimation of the production of composite particles
was enhanced by the introduction of a SCM, however direct-like mechanisms seem to play a role in the
production of deuterons and need to be accounted for.
New neutron-induced data at 175 MeV from C, O, Si and U were also measured at TSL; these data will be soon
available and will provide the opportunity to a systematic study of the pre-equilibrium emission of light complex
particles.
Acknowledgements
We thank M. Hayashi, S. Hirayama, Y. Naito, S. Abe, U. Tippawan, V.D. Simutkin, P. Andersson, J.
Blomgren, M. Österlund, M. Tesinsky, F.-R. Lecolley, N. Marie, A. Hjalmarsson, A. Prokofiev, A. Kolozhvari.
We thank the TSL staff for the assistance during the experiments. This work was supported by the Swedish
Radiation Safety Authority, the Swedish Nuclear Fuel and Waste Management Company, Ringhals AB and by
the European Commission within the Sixth Framework Programme through I3-EFNUDAT (EURATOM contract
no. 036434). RB received financial support from the Japan Student Services Organization and from the Stiftelsen
Th Nordströms testamentsfond granted by the Royal Swedish Academy of Sciences.
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