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Necessary conditions for accurate computations of three-body partial decay widths

AutorGarrido, Eduardo ; Jensen, A.S.; Fedorov, D.V.
Fecha de publicación29-sep-2008
EditorAmerican Physical Society
CitaciónPhysical review C: Nuclear physics 78(3): 034004 (2008)
ResumenThe partial width for decay of a resonance into three fragments is largely determined at distances where the energy is smaller than the effective potential producing the corresponding wave function. At short distances the many-body properties are accounted for by preformation or spectroscopic factors. We use the adiabatic expansion method combined with the WKB approximation to obtain the indispensable cluster model wave functions at intermediate and larger distances. We test the concept by deriving conditions for the minimal basis expressed in terms of partial waves and radial nodes. We compare results for different effective interactions and methods. Agreement is found with experimental values for a sufficiently large basis. We illustrate the ideas with realistic examples from alpha emission of 12C and two-proton emission of 17Ne. Basis requirements for accurate momentum distributions are briefly discussed.
Descripción12 pages, 5 figures, 1 table.-- PACS number(s): 21.45.−v, 23.60.+e, 25.70.Ef, 31.15.xj
Versión del editorhttp://dx.doi.org/10.1103/PhysRevC.78.034004
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