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Pygmy Dipole Streng...
Pygmy Dipole Strength in Exotic Nuclei and the Equation of State
- Article/chapterEnglish2009
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LIBRIS-ID:oai:research.chalmers.se:46d99b49-ea7a-4a12-a630-d06cf64cba54
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https://research.chalmers.se/publication/117505URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:kon swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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A concentration of dipole strength at energies below the giant dipole resonance was observed in neutron-rich nuclei around Sn-132 in an experiment using the FRS-LAND setup. This so-called "pygmy" dipole strength can be related to the parameters of the symmetry energy and to the neutron skin thickness on the grounds of a relativistic quasiparticle random-phase approximation. Using this ansatz and the experimental findings for Sn-130 and 132 Sri, we derive a value of the symmetry energy pressure of (p) over bar (0) = 2.2 +/- 0.5 MeV/fm(3). Neutron skin thicknesses of R-n-R-p = 0.23 +/- 0.03 fm and 0.24 +/- 0.03 fm for Sn-130 and Sn-132, respectively, have been determined. Preliminary results on Ni-68 from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for Ni-58 are in accordance with results from photoabsorption measurements.
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Paar, N.
(author)
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Adrich, P.
(author)
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Fallot, M.
(author)
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Le Bleis, T.
(author)
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Rossi, D.
(author)
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Boretzky, K.
(author)
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Aumann, T.
(author)
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Alvarez-Pol, H.
(author)
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Aksouh, F.
(author)
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Benlliure, J.
(author)
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Berg, T.
(author)
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Boehmer, M.
(author)
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Casarejos, E.
(author)
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Chartier, M.
(author)
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Chatillon, A.
(author)
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Cortina-Gil, D.
(author)
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Pramanik, U. D.
(author)
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Elze, T. W.
(author)
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Emling, H.
(author)
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Ershova, O.
(author)
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Fernando-Dominguez, B.
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Geissel, H.
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Gorska, A.
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Heil, M.
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Hellstrom, M.
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Johansson, Håkan T,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f96hajo
(author)
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Jones, K. L.
(author)
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Junghans, A.
(author)
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Kiselev, O.
(author)
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Kratz, J. V.
(author)
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Kulessa, R.
(author)
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Kurz, N.
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Labiche, M.
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Lemmon, R.
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Litvinov, Y.
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Mahata, K.
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Maierbeck, P.
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Nilsson, Thomas,1965Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tnilsson
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Nociforo, C.
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Palit, R.
(author)
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Paschalis, S.
(author)
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Plag, R.
(author)
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Reifarth, R.
(author)
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Simon, H.
(author)
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Summerer, K.
(author)
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Surowka, G.
(author)
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Vretenar, D.
(author)
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Wagner, A.
(author)
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Walus, W.
(author)
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Weick, H.
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Winkler, M.
(author)
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Chalmers tekniska högskola
(creator_code:org_t)
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In:AIP Conference Proceedings1165, s. 181-184 4611551-76160094-243X
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Klimkiewicz, A.
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Paar, N.
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Adrich, P.
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Fallot, M.
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Le Bleis, T.
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Rossi, D.
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Boretzky, K.
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Aumann, T.
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Alvarez-Pol, H.
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Aksouh, F.
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Benlliure, J.
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Berg, T.
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Boehmer, M.
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Casarejos, E.
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Chartier, M.
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Chatillon, A.
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Cortina-Gil, D.
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Pramanik, U. D.
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Elze, T. W.
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Emling, H.
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Ershova, O.
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Fernando-Domingu ...
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Geissel, H.
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Gorska, A.
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Heil, M.
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Hellstrom, M.
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Johansson, Håkan ...
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Jones, K. L.
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Junghans, A.
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Kiselev, O.
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Kratz, J. V.
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Kulessa, R.
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Kurz, N.
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Labiche, M.
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Lemmon, R.
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Litvinov, Y.
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Mahata, K.
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Maierbeck, P.
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Nilsson, Thomas, ...
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Nociforo, C.
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Palit, R.
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Paschalis, S.
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Plag, R.
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Reifarth, R.
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Simon, H.
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Summerer, K.
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Surowka, G.
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Vretenar, D.
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Wagner, A.
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Walus, W.
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Weick, H.
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Winkler, M.
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