Abstract
Various nuclear reactions like quasi-fission, fusion-fission or particle and cluster evaporation from excited compound nuclei were studied in heavy-ion reactions at the velocity filter SHIP of GSI. The velocity filter offers the possibility to detect all reaction products under zero degree relative to the beam direction. Together with the measurement of the product velocity distribution this allows for an identification of the underlying reaction mechanism. This article is focussed on reactions of 25Mg and 64Ni beams on 206, 207Pb targets at energies of 5.9×AMeV and 8.7×AMeV . Besides evaporation residues from 25Mg + 206Pb collisions we found evidence for rotation and quasi-fission of nuclear molecules formed in the entrance channel after the capture stage. The break-up of the systems showed a preferred clustering leading to isotopes in the region 84 ⩽ Z ⩽ 88 and 122 ⩽ N ⩽ 127 of the chart of nuclei.
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Heinz, S., Comas, V., Heßberger, F.P. et al. Di-nuclear systems studied with the velocity filter SHIP. Eur. Phys. J. A 38, 227–232 (2008). https://doi.org/10.1140/epja/i2008-10671-9
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DOI: https://doi.org/10.1140/epja/i2008-10671-9