Original scientific paper
Spin-flip doublets of 9be spectrum within a cluster model
I. Filikhin
; Department of Physics, North Carolina Central University, Durham, NC 27707, U. S. A.
V. M. Suslov
; Department of Physics, North Carolina Central University, Durham, NC 27707, U. S. A.
B. Vlahović
; Department of Physics, North Carolina Central University, Durham, NC 27707, U. S. A.
Abstract
The structure of the 9Be low-lying spectrum is studied within the cluster model α + α + n. In the model, the total orbital momentum is fixed for each energy level. Thus each level is determined as a member of the spin-flip doublet corresponding to the total orbital momentum (L π = 0+, 2 +, 4 +, 1 −, 2 −, 3 −, 4 −) of the system. The Ali-Bodmer potential (model E) is applied for the αα interaction. We employ a local αn potential which was constructed to reproduce the α − n scattering data. The Pauli blocking is simulated by the repulsive core of the s-wave components of these potentials. Configuration-space Faddeev equations are used to calculate the energy of the bound state (Ecalc = −1.493 MeV vs. Eexp = −1.5735 MeV) and resonances. A variant of the method of analytical continuation in the coupling constant is applied to calculate energies of the low-lying levels. Available 9Be spectral data are satisfactorily reproduced by the proposed model.
Keywords
Hrčak ID:
304717
URI
Publication date:
1.9.2011.
Visits: 409 *