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Low-lying dipole and quadrupole states

Are they new excitation modes?
  • E. G. LanzaEmail author
  • L. Pellegri
  • M. V. Andrés
  • F. Catara
  • A. Vitturi
Regular Article - Theoretical Physics
  • 19 Downloads
Part of the following topical collections:
  1. Giant, Pygmy, Pairing Resonances and Related Topics

Abstract.

We briefly review the main properties of the low-lying dipole states known as Pygmy Dipole Resonance trying to select the main one which could define this new excitation mode. A good candidate seems to be the isoscalar-isovector mixing. This mixing, more effective at the nuclear surface, has been proved by both theoretical and experimental investigations. On the other hand, the study of the low-lying quadrupole states does not seem to provide clear evidence for a new excitation mode. The theoretical approaches used to investigate the quadrupole response reach different conclusions and the experimental data can only clearly establish the multipolarities of the states and their one-phonon character. Moreover, cross section calculations are not sensitive enough to disentangle between quadrupole states which are considered, in one of the theoretical approach, as due to different excitation mode.

References

  1. 1.
    M.N. Harakeh, A. van der Woude, Giant Resonances: Fundamental high-frequency modes of nuclear excitation (Oxford University Press, Oxford 2001)Google Scholar
  2. 2.
    F. Catara, E.G. Lanza, M.A. Nagarajan, A. Vitturi, Nucl. Phys. A 624, 449 (1997)ADSCrossRefGoogle Scholar
  3. 3.
    F. Catara, E.G. Lanza, M.A. Nagarajan, A. Vitturi, Nucl. Phys. A 614, 86 (1997)ADSCrossRefGoogle Scholar
  4. 4.
    N. Paar, D. Vretenar, E. Khan, G. Colò, Rep. Prog. Phys. 70, 691 (2007)ADSCrossRefGoogle Scholar
  5. 5.
    D. Savran, T. Aumann, A. Zilges, Prog. Part. Nucl. Phys. 70, 210 (2013)ADSCrossRefGoogle Scholar
  6. 6.
    T. Aumann, T. Nakamura, Phys. Scr. T 152, 014012 (2013)ADSCrossRefGoogle Scholar
  7. 7.
    A. Bracco, F.C.L. Crespi, E.G. Lanza, Eur. Phys. J. A 51, 99 (2015)ADSCrossRefGoogle Scholar
  8. 8.
    A. Bracco, E.G. Lanza, A. Tamii, Prog. Part. Nucl. Phys. 106, 360 (2019)ADSCrossRefGoogle Scholar
  9. 9.
    LAND Collaboration (A. Klimkiewicz et al.), Phys. Rev. C 76, 051603(R) (2007)Google Scholar
  10. 10.
    A. Carbone, G. Coló, A. Bracco, Li-Gang Cao, P.F. Bortignon, F. Camera, O. Wieland, Phys. Rev. C 81, 041301(R) (2010)ADSCrossRefGoogle Scholar
  11. 11.
    S. Goriely, E. Khan, M. Samyn, Nucl. Phys. A 739, 331 (2004)ADSCrossRefGoogle Scholar
  12. 12.
    E. Litvinova, H.P. Loens, K. Langanke, G. Martinez-Pinedo, T. Rauscher, P. Ring, F.-K. Thielemann, V. Tselyaev, Nucl. Phys. A 823, 26 (2009)ADSCrossRefGoogle Scholar
  13. 13.
    N. Tsoneva, S. Goriely, H. Lenske, R. Schwengner, Phys. Rev. C 91, 044318 (2015)ADSCrossRefGoogle Scholar
  14. 14.
    G.A. Bartholomew, Annu. Rev. Nucl. Sci. 11, 259 (1961)ADSCrossRefGoogle Scholar
  15. 15.
    J.S. Brzosko et al., Can. J. Phys. 47, 2849 (1969)ADSCrossRefGoogle Scholar
  16. 16.
    R. Mohen, M. Danos, L.C. Biedenharn, Phys. Rev. C 3, 1740 (1971)ADSCrossRefGoogle Scholar
  17. 17.
    H. Steinwedel, J.H.D. Jensen, Z. Naturforsch. 5a, 413 (1950)ADSGoogle Scholar
  18. 18.
    Y. Suzuki, K. Ikeda, H. Sato, Prog. Theor. Phys. 83, 180 (1990)ADSCrossRefGoogle Scholar
  19. 19.
    M. Igashira, H. Kitazawa, M. Shimizu, H. Komano, N. Yamamuro, Nucl. Phys. A 457, 301 (1986)ADSCrossRefGoogle Scholar
  20. 20.
    M. Goldhaber, E. Teller, Phys. Rev. 74, 1046 (1948)ADSCrossRefGoogle Scholar
  21. 21.
    P. Van Isacker, M.A. Nagarajan, D.D. Warner, Phys. Rev. C 45, R13 (1992)ADSCrossRefGoogle Scholar
  22. 22.
    S. Peru, H. Goutte, Phys. Rev. C 77, 044313 (2008)ADSCrossRefGoogle Scholar
  23. 23.
    M. Martini, S. Peru, M. Dupuis, Phys. Rev. C 83, 034309 (2011)ADSCrossRefGoogle Scholar
  24. 24.
    K. Yoshida, N. Van Giai, Phys. Rev. C 78, 064316 (2008)ADSCrossRefGoogle Scholar
  25. 25.
    K. Yoshida, T. Nakatsukasa, Phys. Rev. C 88, 034309 (2013)ADSCrossRefGoogle Scholar
  26. 26.
    J. Piekarewicz, Phys. Rev. C 83, 034319 (2011)ADSCrossRefGoogle Scholar
  27. 27.
    D. Vretenar, Y.F. Niu, N. Paar, J. Meng, Phys. Rev. C 85, 044317 (2012)ADSCrossRefGoogle Scholar
  28. 28.
    J. Liang, Li-Gang Cao, Zhong-Yu Ma, Phys. Rev. C 75, 054320 (2007)ADSCrossRefGoogle Scholar
  29. 29.
    N. Paar, P. Ring, T. Nikšić, D. Vretenar, Phys. Rev. C 67, 034312 (2003)ADSCrossRefGoogle Scholar
  30. 30.
    N. Paar, Y.F. Niu, D. Vretenar, J. Meng, Phys. Rev. Lett. 103, 032502 (2009)ADSCrossRefGoogle Scholar
  31. 31.
    D. Peña, E. Khan, P. Ring, Phys. Rev. C 79, 034311 (2009)ADSCrossRefGoogle Scholar
  32. 32.
    V.G. Soloviev, Theory of Atomic Nucleus: quasiparticles and phonons (Institute of Physics, Bristol, 1992)Google Scholar
  33. 33.
    C. Bertulani, Y.Yu. Ponomarev, Phys. Rep. 321, 139 (1999)ADSCrossRefGoogle Scholar
  34. 34.
    V.I. Tselyaev, Phys. Rev. C 75, 024306 (2007)ADSCrossRefGoogle Scholar
  35. 35.
    E. Litvinova, P. Ring, V. Tselyaev, Phys. Rev. C 78, 014312 (2008)ADSCrossRefGoogle Scholar
  36. 36.
    E. Litvinova, P. Ring, V. Tselyaev, K. Langanke, Phys. Rev. C 79, 054312 (2009)ADSCrossRefGoogle Scholar
  37. 37.
    E. Litvinova, P. Ring, V. Tselyaev, Phys. Rev. Lett. 105, 022502 (2010)ADSCrossRefGoogle Scholar
  38. 38.
    G. Colò, L. Cao, N. Van Giai, L. Capelli, Comput. Phys. Comm. 184, 142 (2013)ADSCrossRefGoogle Scholar
  39. 39.
    N. Van Giai, H. Sagawa, Phys. Lett. B 106, 379 (1981)ADSCrossRefGoogle Scholar
  40. 40.
    N. Van Giai, N. Sagawa, Nucl. Phys. A 371, 1 (1981)ADSCrossRefGoogle Scholar
  41. 41.
    P. Papakostantinou, H. Hergert, R. Roth, Phys. Rev. C 92, 034311 (2015)ADSCrossRefGoogle Scholar
  42. 42.
    E.G. Lanza, F. Catara, D. Gambacurta, M.V. Andres, Ph. Chomaz, Phys. Rev. C 79, 054615 (2009)ADSCrossRefGoogle Scholar
  43. 43.
    E.G. Lanza, A. Vitturi, M.V. Andres, F. Catara, D. Gambacurta, Phys. Rev. C 84, 064602 (2011)ADSCrossRefGoogle Scholar
  44. 44.
    X. Roca-Maza, G. Pozzi, M. Brenna, K. Mizuyama, G. Colò, Phys. Rev. C 85, 024601 (2012)ADSCrossRefGoogle Scholar
  45. 45.
    E.G. Lanza, A. Vitturi, M.V. Andres, Phys. Rev. 91, 054607 (2015)ADSGoogle Scholar
  46. 46.
    D. Vretener, N. Paar, P. Ring, T. Nikšić, Phys. Rev. C 65, 021301 (2002)ADSCrossRefGoogle Scholar
  47. 47.
    A. Repko, P.-G. Reinhard, V.O. Nesterenko, J. Kvasil, Phys. Rev. C 87, 024305 (2013)ADSCrossRefGoogle Scholar
  48. 48.
    V. Nesterenko, J. Kvasil, A. Repko, W. Kleinig, P.-G. Reinhard, Phys. At. Nucl. 79, 842 (2016)CrossRefGoogle Scholar
  49. 49.
    N. Nakatsuka et al., Phys. Lett. B 768, 387 (2017)ADSCrossRefGoogle Scholar
  50. 50.
    J. Endres et al., Phys. Rev. Lett. 105, 212503 (2010)ADSCrossRefGoogle Scholar
  51. 51.
    E.G. Lanza, A. Vitturi, E. Litvinova, D. Savran, Phys. Rev. C 89, 041601(R) (2014)ADSCrossRefGoogle Scholar
  52. 52.
    K. Govaert et al., Phys. Rev. C 57, 2229 (1998)ADSCrossRefGoogle Scholar
  53. 53.
    O. Wieland et al., Phys. Rev. Lett. 102, 092502 (2009)ADSCrossRefGoogle Scholar
  54. 54.
    D.M. Rossi et al., Phys. Rev. Lett. 111, 242503 (2013)ADSCrossRefGoogle Scholar
  55. 55.
    N.S. Martorana et al., Phys. Lett. B 782, 112 (2018)ADSCrossRefGoogle Scholar
  56. 56.
    N. Tsoneva, H. Lenske, Phys. Lett. B 695, 174 (2011)ADSCrossRefGoogle Scholar
  57. 57.
    L. Pellegri et al., Phys. Rev. C 92, 014330 (2015)ADSCrossRefGoogle Scholar
  58. 58.
    M. Spieker et al., Phys. Lett. B 752, 102 (2016)ADSCrossRefGoogle Scholar
  59. 59.
    G.R. Satchler, W.G. Love, Phys. Rep. 55, 183 (1979)ADSCrossRefGoogle Scholar
  60. 60.
    G. Bertsch, J. Horysowicz, H. McManus, W.G. Love, Nucl. Phys. A 284, 399 (1977)ADSCrossRefGoogle Scholar
  61. 61.
    E. Yüksel, G. Coló, E. Khan, Y.F. Niu, Phys. Rev. C 97, 064308 (2018)ADSCrossRefGoogle Scholar

Copyright information

© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • E. G. Lanza
    • 1
    • 2
    Email author
  • L. Pellegri
    • 3
    • 4
  • M. V. Andrés
    • 5
  • F. Catara
    • 2
    • 1
  • A. Vitturi
    • 6
    • 7
  1. 1.INFN Sezione di CataniaCataniaItaly
  2. 2.Dipartimento di Fisica e Astronomia “Ettore Majorana”Università di CataniaCataniaItaly
  3. 3.School of PhysicsUniversity of the WitwatersrandJohannesburgSouth Africa
  4. 4.iThemba LABSSomerset WestSouth Africa
  5. 5.Departamento de FAMN, Facultad de FísicaSevillaSpain
  6. 6.Dipartimento di Fisica e Astronomia “Galileo Galilei”Università di PadovaPadovaItaly
  7. 7.INFN Sezione di PadovaPadovaItaly

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