Elastische Deuteronenstreuung im Energiebereich zwischen 50 und 85 Mev

Bojowald, J.

Book/Report

FZJ-2018-02392

Elastische Deuteronenstreuung im Energiebereich zwischen 50 und 85 Mev

Bojowald, J. (Corresponding author)FZJ*

1984
Kernforschungsanlage Jülich, Verlag Jülich

Jülich : Kernforschungsanlage Jülich, Verlag, Berichte der Kernforschungsanlage Jülich 1927, 151 p. (1984)

Please use a persistent id in citations: http://hdl.handle.net/2128/18045

Report No.: Juel-1927

Abstract: To investigate the elastic deuteron scattering, the angular distributions of deuterons scattered from the target nuclei $^{27}$Al, $^{89}$y, $^{120}$Sn and $^{208}$Pb were measured at 58.7 and 85 MeV at the isochronous cyclotron JULIC. The charged particles were detected and separated by means of $\Delta$E/E-semiconductor telescopes using (because of the high particle energies) 20 mm long Ge(Li)-diodes (as E-detectors) and modified preamplifiers. Deadtime, loss of efficiency due to radiation damage as well as to nuclear reactions in the Ge(Li)-detectors, and deviations of the beam from the optical axis were controlled periodically and taken into account accordingly in the data analysis. The performance of these preventive measures and the determination of the correction factors aredescribed in detail in the experimental part and in the appendices of the text. The data were analyzed in the framework of the optical model with the aim to determine the parameters of the optical deuteron potential as a function of energy and target mass. The usual phenomenological parametrization of the optical potential with Woods-Saxon-type form factors was adopted. The large numberof possible free parameters was reduced by considering the results of the theoretical derivation of the deuteron potential using the folding model. In order to get a broader possible basis for the determination of the potential parameters, some angular distributions of other authors at 52 and 80 MeV were included in the analysis, among these analyzing power data measured recently. In the sections describing the optical potential generally and the optical deuteron potential especially the basics of the microscopic calculations andthe folding model are reported. The importance of the deuteron break-up in the derivation of the deuteron potential is shown. The semiclassical models are also presented which make use of both quantummechanical and classical aspects and give a simple and "illustrative" interpretation of the experimental results.

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