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Pygmy dipole resonance in Pb-208

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Pygmy dipole resonance in Pb-208

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dc.contributor.author	Poltoratska, I.
dc.contributor.author	Fujita, H.
dc.contributor.author	Fujita, K.
dc.contributor.author	Fujita, Y.
dc.contributor.author	Rubio Barroso, Berta
dc.contributor.author	Suzuki, Takashi
dc.date.accessioned	2015-03-20T10:02:47Z
dc.date.available	2015-03-20T10:02:47Z
dc.date.issued	2012
dc.identifier.citation	Poltoratska, I. Fujita, H. Fujita, K. Fujita, Y. Rubio Barroso, Berta Suzuki, Takashi 2012 Pygmy dipole resonance in Pb-208 Physical Review C 85 4 041304
dc.identifier.uri	http://hdl.handle.net/10550/42762
dc.description.abstract	Scattering of protons of several hundred MeV is a promising new spectroscopic tool for the study of electric dipole strength in nuclei. A case study of 208Pb shows that at very forward angles Jˇ = 1− states are strongly populated via Coulomb excitation. A separation from nuclear excitation of other modes is achieved by a multipole decomposition analysis of the experimental cross sections based on theoretical angular distributions calculated within the quasiparticle-phonon model. The B(E1) transition strength distribution is extracted for excitation energies up to 9 MeV, i.e., in the region of the so-called pygmy dipole resonance (PDR). The Coulomb-nuclear interference shows sensitivity to the underlying structure of the E1 transitions, which allows for the first time an experimental extraction of the electromagnetic transition strength and the energy centroid of the PDR.
dc.language.iso	eng
dc.relation.ispartof	Physical Review C, 2012, vol. 85, num. 4, p. 041304
dc.subject	Física
dc.title	Pygmy dipole resonance in Pb-208
dc.type	journal article	es_ES
dc.date.updated	2015-03-20T10:02:47Z
dc.identifier.doi	10.1103/PhysRevC.85.041304
dc.identifier.idgrec	079899
dc.rights.accessRights	open access	es_ES