Isospin Character of the Pygmy Dipole Resonance in Sn-124

J. Endres, E. Litvinova, D. Savran, P. A. Butler, M. N. Harakeh, S. Harissopulos, R. -D. Herzberg, R. Kruecken, A. Lagoyannis, N. Pietralla, V. Yu Ponomarev, L. Popescu, P. Ring, M. Scheck, K. Sonnabend, V. I. Stoica, H. J. Wortche, A. Zilges

Research output: Contribution to journalArticle

Abstract

The pygmy dipole resonance has been studied in the proton-magic nucleus Sn-124 with the (alpha, alpha'gamma) coincidence method at E-alpha = 136 MeV. The comparison with results of photon-scattering experiments reveals a splitting into two components with different structure: one group of states which is excited in (alpha, alpha'gamma) as well as in (gamma, gamma') reactions and a group of states at higher energies which is only excited in (gamma, gamma') reactions. Calculations with the self-consistent relativistic quasiparticle time-blocking approximation and the quasiparticle phonon model are in qualitative agreement with the experimental results and predict a low-lying isoscalar component dominated by neutron-skin oscillations and a higher-lying more isovector component on the tail of the giant dipole resonance.
Original languageEnglish
Article number212503
JournalPhysical Review Letters
Volume105
Issue number21
DOIs
Publication statusPublished - 19 Nov 2010
Externally publishedYes

Cite this

Endres, J., Litvinova, E., Savran, D., Butler, P. A., Harakeh, M. N., Harissopulos, S., ... Zilges, A. (2010). Isospin Character of the Pygmy Dipole Resonance in Sn-124. Physical Review Letters, 105(21), [212503]. https://doi.org/10.1103/PhysRevLett.105.212503
Endres, J. ; Litvinova, E. ; Savran, D. ; Butler, P. A. ; Harakeh, M. N. ; Harissopulos, S. ; Herzberg, R. -D. ; Kruecken, R. ; Lagoyannis, A. ; Pietralla, N. ; Ponomarev, V. Yu ; Popescu, L. ; Ring, P. ; Scheck, M. ; Sonnabend, K. ; Stoica, V. I. ; Wortche, H. J. ; Zilges, A. / Isospin Character of the Pygmy Dipole Resonance in Sn-124. In: Physical Review Letters. 2010 ; Vol. 105, No. 21.
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abstract = "The pygmy dipole resonance has been studied in the proton-magic nucleus Sn-124 with the (alpha, alpha'gamma) coincidence method at E-alpha = 136 MeV. The comparison with results of photon-scattering experiments reveals a splitting into two components with different structure: one group of states which is excited in (alpha, alpha'gamma) as well as in (gamma, gamma') reactions and a group of states at higher energies which is only excited in (gamma, gamma') reactions. Calculations with the self-consistent relativistic quasiparticle time-blocking approximation and the quasiparticle phonon model are in qualitative agreement with the experimental results and predict a low-lying isoscalar component dominated by neutron-skin oscillations and a higher-lying more isovector component on the tail of the giant dipole resonance.",
author = "J. Endres and E. Litvinova and D. Savran and Butler, {P. A.} and Harakeh, {M. N.} and S. Harissopulos and Herzberg, {R. -D.} and R. Kruecken and A. Lagoyannis and N. Pietralla and Ponomarev, {V. Yu} and L. Popescu and P. Ring and M. Scheck and K. Sonnabend and Stoica, {V. I.} and Wortche, {H. J.} and A. Zilges",
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Endres, J, Litvinova, E, Savran, D, Butler, PA, Harakeh, MN, Harissopulos, S, Herzberg, R-D, Kruecken, R, Lagoyannis, A, Pietralla, N, Ponomarev, VY, Popescu, L, Ring, P, Scheck, M, Sonnabend, K, Stoica, VI, Wortche, HJ & Zilges, A 2010, 'Isospin Character of the Pygmy Dipole Resonance in Sn-124' Physical Review Letters, vol. 105, no. 21, 212503. https://doi.org/10.1103/PhysRevLett.105.212503

Isospin Character of the Pygmy Dipole Resonance in Sn-124. / Endres, J.; Litvinova, E.; Savran, D.; Butler, P. A.; Harakeh, M. N.; Harissopulos, S.; Herzberg, R. -D.; Kruecken, R.; Lagoyannis, A.; Pietralla, N.; Ponomarev, V. Yu; Popescu, L.; Ring, P.; Scheck, M.; Sonnabend, K.; Stoica, V. I.; Wortche, H. J.; Zilges, A.

In: Physical Review Letters, Vol. 105, No. 21, 212503, 19.11.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Isospin Character of the Pygmy Dipole Resonance in Sn-124

AU - Endres, J.

AU - Litvinova, E.

AU - Savran, D.

AU - Butler, P. A.

AU - Harakeh, M. N.

AU - Harissopulos, S.

AU - Herzberg, R. -D.

AU - Kruecken, R.

AU - Lagoyannis, A.

AU - Pietralla, N.

AU - Ponomarev, V. Yu

AU - Popescu, L.

AU - Ring, P.

AU - Scheck, M.

AU - Sonnabend, K.

AU - Stoica, V. I.

AU - Wortche, H. J.

AU - Zilges, A.

PY - 2010/11/19

Y1 - 2010/11/19

N2 - The pygmy dipole resonance has been studied in the proton-magic nucleus Sn-124 with the (alpha, alpha'gamma) coincidence method at E-alpha = 136 MeV. The comparison with results of photon-scattering experiments reveals a splitting into two components with different structure: one group of states which is excited in (alpha, alpha'gamma) as well as in (gamma, gamma') reactions and a group of states at higher energies which is only excited in (gamma, gamma') reactions. Calculations with the self-consistent relativistic quasiparticle time-blocking approximation and the quasiparticle phonon model are in qualitative agreement with the experimental results and predict a low-lying isoscalar component dominated by neutron-skin oscillations and a higher-lying more isovector component on the tail of the giant dipole resonance.

AB - The pygmy dipole resonance has been studied in the proton-magic nucleus Sn-124 with the (alpha, alpha'gamma) coincidence method at E-alpha = 136 MeV. The comparison with results of photon-scattering experiments reveals a splitting into two components with different structure: one group of states which is excited in (alpha, alpha'gamma) as well as in (gamma, gamma') reactions and a group of states at higher energies which is only excited in (gamma, gamma') reactions. Calculations with the self-consistent relativistic quasiparticle time-blocking approximation and the quasiparticle phonon model are in qualitative agreement with the experimental results and predict a low-lying isoscalar component dominated by neutron-skin oscillations and a higher-lying more isovector component on the tail of the giant dipole resonance.

U2 - 10.1103/PhysRevLett.105.212503

DO - 10.1103/PhysRevLett.105.212503

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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Endres J, Litvinova E, Savran D, Butler PA, Harakeh MN, Harissopulos S et al. Isospin Character of the Pygmy Dipole Resonance in Sn-124. Physical Review Letters. 2010 Nov 19;105(21). 212503. https://doi.org/10.1103/PhysRevLett.105.212503