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AbstractAbstract
[en] Features of the prior-form distorted wave Born approximation theory of elastic break-up of 156 MeV 6Li ions scattered off 208Pb are investigated. Nuclear breakup for large relative energies of the outgoing α-particle and deuteron fragments (Eαd>5 MeV) studied here is found to proceed dominantly via the quadrupole scattering state of the α+d system when transition potentials from elastic fragment-target scattering are used for the calculations. The coherent contributions of different multipole components to the triple differential cross-sections appear to be very sensitive to the potentials generating the distorted waves and representing the cluster fragment-target interactions. The results of the analysis of the experimental data require transition potentials rather different from the on-the-mass shell optical potentials deduced from elastic α-particle and deuteron scattering. (orig.)
[de]
Die Prior-Form DWBA Aufbruchtheorie wird fuer den Fall des elastischen Aufbruchs von 156 MeV 6Li Projektilen untersucht. Fuer groessere Relativenergien (Eαd > 5 MeV) der α-Teilchen- und Deuteron-Fragmente dominiert die Quadrupolkomponente des nuklearen Aufbruchs, falls man als Uebergangspotentiale die optischen Potentiale der elastischen Fragment-Target-Streuung fuer die Rechnungen zugrunde legt. Die kohaerenten Beitraege verschiedener Multipolkomponenten des α+d Streusystems sind empfindlich auf die Potentiale, welche die 'distorted waves' generieren und die Clusterfragment-Targetwechselwirkung beschreiben. Die Resultate der Analyse der experimentellen Wirkungsquerschnitte verlangen Uebergangspotentiale, die sich erheblich von den optischen Potentialen unterscheiden, welche die elastische Streuung von α-Teilchen und Deuteronen wiedergeben. (orig.)Primary Subject
Source
Jun 1989; 37 p
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
ALPHA PARTICLES, ALPHA SPECTRA, ANGULAR CORRELATION, BREAKUP REACTIONS, COHERENT SCATTERING, D WAVES, DEUTERONS, DIFFERENTIAL CROSS SECTIONS, DWBA, ENERGY SPECTRA, F WAVES, FINAL-STATE INTERACTIONS, LEAD 208, LEAD 208 TARGET, LITHIUM 6 REACTIONS, MATRIX ELEMENTS, MEV RANGE 100-1000, NUCLEAR FRAGMENTS, NUCLEAR POTENTIAL, OPTICAL MODELS, P WAVES, QUASI-ELASTIC SCATTERING, S MATRIX, S WAVES, THEORETICAL DATA
BORN APPROXIMATION, CHARGED PARTICLES, CORRELATIONS, CROSS SECTIONS, DATA, ENERGY RANGE, EVEN-EVEN NUCLEI, HEAVY ION REACTIONS, HEAVY NUCLEI, HELIUM IONS, INFORMATION, INTERACTIONS, IONIZING RADIATIONS, IONS, ISOTOPES, LEAD ISOTOPES, MATHEMATICAL MODELS, MATRICES, MEV RANGE, NUCLEAR REACTIONS, NUCLEI, NUMERICAL DATA, PARTIAL WAVES, POTENTIALS, RADIATIONS, SCATTERING, SPECTRA, STABLE ISOTOPES, TARGETS
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