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. and Zilges, A. (2010). Isospin Character of the Pygmy Dipole Resonance in Sn-124. Phys. Rev. Lett., 105 (21). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Endres, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Litvinova, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Savran, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Butler, P. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Harakeh, M. N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Harissopulos, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herzberg, R. -D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kruecken, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lagoyannis, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pietralla, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ponomarev, V. YuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Popescu, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ring, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scheck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sonnabend, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stoica, V. I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wortche, H. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zilges, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-492438
DOI: 10.1103/PhysRevLett.105.212503
Journal or Publication Title: Phys. Rev. Lett.
Volume: 105
Number: 21
Date: 2010
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
NUCLEI; STRENGTH; ENERGY; MODESMultiple languages
Physics, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49243

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