Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 6: Theory II

HK 6.10: Vortrag

Montag, 8. März 2004, 18:30–18:45, E

P-shell nuclei within the modified J-matrix approach to scattering — •Arina Sytcheva¹, Frans Arickx¹, Jan Broeckhove¹, and Viktor Vasilevsky² — ¹Groupe Computational Modeling and Programming, University of Antwerpen, Middelheimlaan, 1, 2020, Antwerpen, Belgium — ²Bogoliubov Institute for Theoretical Physics, Metrolohichna str., 14-b, Kiev, 03143, Ukraine

We will discuss coupled-channel calculations in two-cluster systems with the possibility of collective excitations. We present a number of results for such nuclei as ⁵He, ⁵Li and ⁸Be. We use the modified J-matrix method with the No-dqfrozenNo-dq clusters. We take into account three possible channels - cluster, monopole and quadrupole. Our focus is on the energy region where only the cluster channel is open and the quadrupole and monopole channels are closed. We calculate the phase shifts and derive energies and widths of resonances within coupled and uncoupled channel calculations. We can provide a clear-cut analysis of the resonances which appear in the two-cluster continuum in terms of individual channel contributions.