Pygmy dipole response of proton rich argon beyond the random phase approximation

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dc.creatorBarbieri, C.
dc.creatorCaurier, E.
dc.creatorLanganke, K.
dc.creatorMartínez-Pinedo, G.
dc.date2007-12-19
dc.date.accessioned2026-07-07T08:50:24Z
dc.date.available2026-07-07T08:50:24Z
dc.descriptionThe occurrence of a pygmy dipole resonance in proton rich Ar-32 and Ar-34 is studied using the unitary correlator operator method interaction Vucom, based on Argonne V18. Predictions from the random phase approximation (RPA) and the shell model in a no-core basis are compared. It is found that the inclusion of configuration mixing up to two-particle--two-holes broadens the pygmy strength slightly and reduces sensibly its strength, as compared to the RPA predictions. For Ar-32 a clear peak associated with a pygmy resonance is found. For Ar-34, the pygmy states are obtained close to the giant dipole resonance and mix with it.
dc.descriptionSubmitted to Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/0712.3254
dc.identifierhttp://arxiv.org/abs/0712.3254
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144594
dc.subjectNuclear Theory
dc.titlePygmy dipole response of proton rich argon beyond the random phase approximation
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