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HK: Physik der Hadronen und Kerne

HK 22: Postersitzung

HK 22.99: Poster

Montag, 7. März 2005, 16:30–18:00, TU MA141

Theoretical Description of a Quenching of the Neutron Channel observed in d+d Reactions within some Host Metals — •Tatiana Dorsch, Konrad Czerski, Peter Heide, and Armin Huke — Institut für Atomare Physik und Fachdidaktik, Technische Universität Berlin, Berlin, Germany

Angular distributions and the neutron-proton branching ratio of the mirror reactions ²H(d,p)³H and ²H(d,n)³He have been investigated using different deuterized metallic targets the projectile energies ranging from 5 to 60 keV. Whereas the experimental results obtained for Al, Zr, Pd and Ta targets do not differ from those known from gas-target experiments, an enhancement of the angular anisotropy in the neutron channel and a quenching of the neutron-proton branching ratio have been observed for Li and Sr targets at deuteron energies below 20 keV. A theoretical analysis of the experimental results has been performed using a parameterization of all possible channel-spin matrix-elements. Assuming an induced polarization of reacting deuterons, the observed asymmetry effects between the neutron and proton channels could be explained within an adiabatic approximation.