Interaction of 12.7 GeV He-4 ions with U, Pb, Au and Ag targets
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The processes of production of fragments Z greater than or equal to 8 in the interactions of 12.7 GeV He-4 with U, Pb, Au and Ag have been analyzed using the polycarbonate track detector Makrofol. A sandwich technique was used which enables direct evidence for multiple fragment emission by a single nucleus. The decay channels ending with one, two or more (three, four) fragments were detected. A classification scheme based on the multiplicity of heavy fragments M-H (Z GT 20) was used in order to identify events belonging to the different reaction channels. Cross sections, excitation energies and multiplicities of intermediate mass fragments (8 less than or equal to Z less than or equal to 20) have been evaluated for various reaction mechanisms. The experimental features of the fragmentation process have been analyzed as a function of the target mass.
Keywords:fission / associated spallation / multifragmentation / Makrofol detector
Source:Radiation Measurements, 1997, 28, 1-6, 291-296
- 18th International Conference on Nuclear Tracks in Solids, Sep 01-05, 1996, Cairo, Egypt