A multitude of discrete 2+ states in Sn124 with energy up to 5 MeV were populated and identified with the (O17, O′17γ) reaction at 340 MeV. Cross sections were compared with distorted wave Born approximation predictions and in general a good agreement was found. The measured energy and intensity distributions of the 2+ states are very similar to the predictions based on self-consistent density functional theory and extended QRPA approach accounting for multiphonon degrees of freedom. This provides evidence of the excitation of the pygmy quadrupole resonance in skin nuclei.

Multitude of 2+ discrete states in Sn 124 observed via the (O 17, O ′ 17 γ) reaction : Evidence for pygmy quadrupole states / L. Pellegri, A. Bracco, N. Tsoneva, R. Avigo, G. Benzoni, N. Blasi, S. Bottoni, F. Camera, S. Ceruti, F.C.L. Crespi, A. Giaz, S. Leoni, H. Lenske, B. Million, A.I. Morales, R. Nicolini, O. Wieland, D. Bazzacco, P. Bednarczyk, B. Birkenbach, M. Ciemała, G. De Angelis, E. Farnea, A. Gadea, A. Görgen, A. Gottardo, J. Grebosz, R. Isocrate, M. Kmiecik, M. Krzysiek, S. Lunardi, A. Maj, K. Mazurek, D. Mengoni, C. Michelagnoli, D.R. Napoli, F. Recchia, B. Siebeck, S. Siem, C. Ur, J.J. Valiente-Dobón. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 92:1(2015 Jul 31), pp. 014330.1-014330.7.

Multitude of 2+ discrete states in Sn 124 observed via the (O 17, O ′ 17 γ) reaction : Evidence for pygmy quadrupole states

L. Pellegri
Primo
;
A. Bracco
Secondo
;
R. Avigo;S. Bottoni;F. Camera;S. Ceruti;F.C.L. Crespi;A. Giaz;S. Leoni;R. Nicolini;
2015

Abstract

A multitude of discrete 2+ states in Sn124 with energy up to 5 MeV were populated and identified with the (O17, O′17γ) reaction at 340 MeV. Cross sections were compared with distorted wave Born approximation predictions and in general a good agreement was found. The measured energy and intensity distributions of the 2+ states are very similar to the predictions based on self-consistent density functional theory and extended QRPA approach accounting for multiphonon degrees of freedom. This provides evidence of the excitation of the pygmy quadrupole resonance in skin nuclei.
Nuclear and High Energy Physics
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/387618
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