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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Kern- und Teilchen-Astrophysik

HK 15.5: Vortrag

Dienstag, 13. März 2007, 15:15–15:30, E

Isotopic Production Cross Sections in Proton-Nucleus — •H. Machner^{1, 2}, D. Aschman⁶, K. Baruth-Ram^{3, 4}, J. Carter², A. Cowley⁵, F. Goldenbaum⁶, B. Nangu⁷, J. Pilcher⁴, E. Sideras-Hadad², J. P. Sellschop², F. Smit⁴, B. Spoelstra⁷, and D. Steyn⁶ — ¹Institut für Kernphysik, FZ Jülich, 52425 Jülich, Germany — ²Dept. of Physics, University of the Witwatersrand, Johannesburg, South Africa — ³Dept. of Physics, University of Durban-Westville, South Africa — ⁴iThemba Labs, Faure, South Africa — ⁵Dept. of Physics, University of Stellenbosch, Stellenbosch, South Africa — ⁶Dept. of Physics, University of Cape Town, Cape Town, South Africa — ⁷Dept. of Physics, University of Zululand, Kwa-Dlangezwa, South Africa

Studies of spallation processes, both experimental and theoretical, are numerous. One reason for this may be the importance of knowledge of cross sections and reaction mechanisms for our understanding of cosmic rays and the production of cosmogenic radionuclides, and the process of neutron production in spallation sources.

Intermediate mass fragments (IMF) from the interaction of ²⁷Al, ⁵⁹Co and ¹⁹⁷Au with 200 MeV protons were measured in an angular range from 20 degree to 120 degree in the laboratory system. The fragments, ranging from isotopes of helium up to isotopes of carbon, were isotopically resolved. Double differential cross sections, energy differential cross sections and total cross sections were extracted.

Nuclear reaction mechanism as well as relations to nuclear astrophysics are discussed.