Pygmy Dipole Strength in Exotic Nuclei and the Equation of State

A. Klimkiewicz; N. Paar; P. Adrich; M. Fallot; T. Le Bleis; D. Rossi; K. Boretzky; T. Aumann; H. Alvarez-Pol; F. Aksouh; J. Benlliure; T. Berg; M. Boehmer; E. Casarejos; M. Chartier; A. Chatillon; D. Cortina-Gil; U. Datta Pramanik; Th W. Elze; H. Emling; O. Ershova; B. Femando-Dominguez; H. Geissel; M. Gorska; M. Heil; M. Hellström; H. Johansson; K. L. Jones; A. Junghans; O. Kiselev; J. V. Kratz; R. Kulessa; N. Kurz; M. Labiche; R. Lemmon; Y. Litvinov; K. Mahata; P. Maierbeck; T. Nilsson; C. Nociforo; R. Palit; S. Paschalis; R. Plag; R. Reifarth; H. Simon; K. Sümmerer; G. Surówka; D. Vretenar; A. Wagner; W. Waluś; H. Weick; M. Winkler

doi:10.1063/1.3232065

Pygmy Dipole Strength in Exotic Nuclei and the Equation of State

A. Klimkiewicz^*, N. Paar, P. Adrich, M. Fallot, T. Le Bleis, D. Rossi, K. Boretzky, T. Aumann, H. Alvarez-Pol, F. Aksouh, J. Benlliure, T. Berg, M. Boehmer, E. Casarejos, M. Chartier, A. Chatillon, D. Cortina-Gil, U. Datta Pramanik, Th W. Elze, H. EmlingO. Ershova, B. Femando-Dominguez, H. Geissel, M. Gorska, M. Heil, M. Hellström, H. Johansson, K. L. Jones, A. Junghans, O. Kiselev, J. V. Kratz, R. Kulessa, N. Kurz, M. Labiche, R. Lemmon, Y. Litvinov, K. Mahata, P. Maierbeck, T. Nilsson, C. Nociforo, R. Palit, S. Paschalis, R. Plag, R. Reifarth, H. Simon, K. Sümmerer, G. Surówka, D. Vretenar, A. Wagner, W. Waluś, H. Weick, M. Winkler

^*Corresponding author for this work

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A concentration of dipole strengtli at energies below the giant dipole resonance was observed in neutron-rich nuclei around ¹³²Sn in an experiment using the FRS-LAND setup. This socalled "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 ¹³⁰"Sn and ¹³²Sn, we derive a value of the symmetry energy pressure ofp̄o = 2.2 ±0.5 MeV/fm³. Neutron skin thicknesses of R_n-R_p = 0.23 ± 0.03 fm and 0.24 ± 0.03 fm for ¹³⁰"Sn and ¹³²Sn, respectively, have been determined. Preliminary results on ⁶⁸Ni from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for ⁵⁸Ni are in accordance with results from photoabsorption measurements.

Original language	English
Title of host publication	AIP Conference Proceedings
Pages	181-184
Number of pages	4
Volume	1165
DOIs	https://doi.org/10.1063/1.3232065
Publication status	Published - 2009
Event	International Conference on Nuclear Structure and Dynamics '09 - Dubrovnik, Croatia Duration: 4 May 2009 → 8 May 2009

Conference

Conference	International Conference on Nuclear Structure and Dynamics '09
Country/Territory	Croatia
City	Dubrovnik
Period	4/05/09 → 8/05/09

Keywords

,Sn
,Ni
Electromagnetic excitation
Giant Dipole Resonance
Neutron Skin
Pygmy Dipole Resonance
Symmetry Energy

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10.1063/1.3232065

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Klimkiewicz, A., Paar, N., Adrich, P., Fallot, M., Le Bleis, T., Rossi, D., Boretzky, K., Aumann, T., Alvarez-Pol, H., Aksouh, F., Benlliure, J., Berg, T., Boehmer, M., Casarejos, E., Chartier, M., Chatillon, A., Cortina-Gil, D., Datta Pramanik, U., Elze, T. W., ... Winkler, M. (2009). Pygmy Dipole Strength in Exotic Nuclei and the Equation of State. In AIP Conference Proceedings (Vol. 1165, pp. 181-184) https://doi.org/10.1063/1.3232065

@inproceedings{48865ab8a33640f195eba721d8887222,

title = "Pygmy Dipole Strength in Exotic Nuclei and the Equation of State",

abstract = "A concentration of dipole strengtli at energies below the giant dipole resonance was observed in neutron-rich nuclei around 132Sn in an experiment using the FRS-LAND setup. This socalled {"}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 130{"}Sn and 132Sn, we derive a value of the symmetry energy pressure of{\=p}o = 2.2 ±0.5 MeV/fm3. Neutron skin thicknesses of Rn-Rp = 0.23 ± 0.03 fm and 0.24 ± 0.03 fm for 130{"}Sn and 132Sn, respectively, have been determined. Preliminary results on 68Ni from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for 58Ni are in accordance with results from photoabsorption measurements.",

keywords = ",Sn, ,Ni, Electromagnetic excitation, Giant Dipole Resonance, Neutron Skin, Pygmy Dipole Resonance, Symmetry Energy",

author = "A. Klimkiewicz and N. Paar and P. Adrich and M. Fallot and {Le Bleis}, T. and D. Rossi and K. Boretzky and T. Aumann and H. Alvarez-Pol and F. Aksouh and J. Benlliure and T. Berg and M. Boehmer and E. Casarejos and M. Chartier and A. Chatillon and D. Cortina-Gil and {Datta Pramanik}, U. and Elze, {Th W.} and H. Emling and O. Ershova and B. Femando-Dominguez and H. Geissel and M. Gorska and M. Heil and M. Hellstr{\"o}m and H. Johansson and Jones, {K. L.} and A. Junghans and O. Kiselev and Kratz, {J. V.} and R. Kulessa and N. Kurz and M. Labiche and R. Lemmon and Y. Litvinov and K. Mahata and P. Maierbeck and T. Nilsson and C. Nociforo and R. Palit and S. Paschalis and R. Plag and R. Reifarth and H. Simon and K. S{\"u}mmerer and G. Sur{\'o}wka and D. Vretenar and A. Wagner and W. Walu{\'s} and H. Weick and M. Winkler",

year = "2009",

doi = "10.1063/1.3232065",

language = "English",

isbn = "9780735407022",

volume = "1165",

pages = "181--184",

booktitle = "AIP Conference Proceedings",

note = "International Conference on Nuclear Structure and Dynamics '09 ; Conference date: 04-05-2009 Through 08-05-2009",

}

Klimkiewicz, A, Paar, N, Adrich, P, Fallot, M, Le Bleis, T, Rossi, D, Boretzky, K, Aumann, T, Alvarez-Pol, H, Aksouh, F, Benlliure, J, Berg, T, Boehmer, M, Casarejos, E, Chartier, M, Chatillon, A, Cortina-Gil, D, Datta Pramanik, U, Elze, TW, Emling, H, Ershova, O, Femando-Dominguez, B, Geissel, H, Gorska, M, Heil, M, Hellström, M, Johansson, H, Jones, KL, Junghans, A, Kiselev, O, Kratz, JV, Kulessa, R, Kurz, N, Labiche, M, Lemmon, R, Litvinov, Y, Mahata, K, Maierbeck, P, Nilsson, T, Nociforo, C, Palit, R, Paschalis, S, Plag, R, Reifarth, R, Simon, H, Sümmerer, K, Surówka, G, Vretenar, D, Wagner, A, Waluś, W, Weick, H & Winkler, M 2009, Pygmy Dipole Strength in Exotic Nuclei and the Equation of State. in AIP Conference Proceedings. vol. 1165, pp. 181-184, International Conference on Nuclear Structure and Dynamics '09, Dubrovnik, Croatia, 4/05/09. https://doi.org/10.1063/1.3232065

TY - GEN

T1 - Pygmy Dipole Strength in Exotic Nuclei and the Equation of State

AU - Klimkiewicz, A.

AU - Paar, N.

AU - Adrich, P.

AU - Fallot, M.

AU - Le Bleis, T.

AU - Rossi, D.

AU - Boretzky, K.

AU - Aumann, T.

AU - Alvarez-Pol, H.

AU - Aksouh, F.

AU - Benlliure, J.

AU - Berg, T.

AU - Boehmer, M.

AU - Casarejos, E.

AU - Chartier, M.

AU - Chatillon, A.

AU - Cortina-Gil, D.

AU - Datta Pramanik, U.

AU - Elze, Th W.

AU - Emling, H.

AU - Ershova, O.

AU - Femando-Dominguez, B.

AU - Geissel, H.

AU - Gorska, M.

AU - Heil, M.

AU - Hellström, M.

AU - Johansson, H.

AU - Jones, K. L.

AU - Junghans, A.

AU - Kiselev, O.

AU - Kratz, J. V.

AU - Kulessa, R.

AU - Kurz, N.

AU - Labiche, M.

AU - Lemmon, R.

AU - Litvinov, Y.

AU - Mahata, K.

AU - Maierbeck, P.

AU - Nilsson, T.

AU - Nociforo, C.

AU - Palit, R.

AU - Paschalis, S.

AU - Plag, R.

AU - Reifarth, R.

AU - Simon, H.

AU - Sümmerer, K.

AU - Surówka, G.

AU - Vretenar, D.

AU - Wagner, A.

AU - Waluś, W.

AU - Weick, H.

AU - Winkler, M.

PY - 2009

Y1 - 2009

N2 - A concentration of dipole strengtli at energies below the giant dipole resonance was observed in neutron-rich nuclei around 132Sn in an experiment using the FRS-LAND setup. This socalled "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 130"Sn and 132Sn, we derive a value of the symmetry energy pressure ofp̄o = 2.2 ±0.5 MeV/fm3. Neutron skin thicknesses of Rn-Rp = 0.23 ± 0.03 fm and 0.24 ± 0.03 fm for 130"Sn and 132Sn, respectively, have been determined. Preliminary results on 68Ni from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for 58Ni are in accordance with results from photoabsorption measurements.

AB - A concentration of dipole strengtli at energies below the giant dipole resonance was observed in neutron-rich nuclei around 132Sn in an experiment using the FRS-LAND setup. This socalled "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 130"Sn and 132Sn, we derive a value of the symmetry energy pressure ofp̄o = 2.2 ±0.5 MeV/fm3. Neutron skin thicknesses of Rn-Rp = 0.23 ± 0.03 fm and 0.24 ± 0.03 fm for 130"Sn and 132Sn, respectively, have been determined. Preliminary results on 68Ni from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for 58Ni are in accordance with results from photoabsorption measurements.

KW - ,Sn

KW - ,Ni

KW - Electromagnetic excitation

KW - Giant Dipole Resonance

KW - Neutron Skin

KW - Pygmy Dipole Resonance

KW - Symmetry Energy

UR - http://www.scopus.com/inward/record.url?scp=70449912912&partnerID=8YFLogxK

U2 - 10.1063/1.3232065

DO - 10.1063/1.3232065

M3 - Conference contribution

AN - SCOPUS:70449912912

SN - 9780735407022

VL - 1165

SP - 181

EP - 184

BT - AIP Conference Proceedings

T2 - International Conference on Nuclear Structure and Dynamics '09

Y2 - 4 May 2009 through 8 May 2009

ER -

Pygmy Dipole Strength in Exotic Nuclei and the Equation of State

Abstract

Conference

Keywords

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