Intermediate mass fragment production in the proton-induced reactions of heavy targets    [PDF]

A. Deppman, E. Andrade-II, V. Guimaraes, G. S. Karapetyan, A. R. Balabekyan, N. A. Demekhina, J. Adam
The production of intermediate-mass fragments (IMFs) formed in the proton-induced reaction with $^{238}$U and $^{237}$Np at 660 MeV was measured in the LNP Phasotron and in U-400M Cyclotron, Joint Institute for Nuclear Research (JINR), Dubna, Russia. We have applied the induced-activation method in off-line analysis. A total of 115 isotopes of all elements in the range $7 \leq A \leq 69$ were unambiguously identified with high precision. There is a consideration that the formed nuclides could be produced in a very asymmetric binary decay of heavy nuclei originating from the spallation of heavy targets. Mass-yield distributions were derived from the data, and were compared with the the simulation code CRISP for multi modal fission.
View original: http://arxiv.org/abs/1306.3304