Pygmy dipole resonance in ^140Ce via inelastic scattering of ^17O

Krzysiek, M. and Kmiecik, M. and Maj, A. and Bednarczyk, P. and Bracco, A. and Crespi, F. C. L. and Lanza, E. G. and Litvinova, E. and Paar, Nils and Avigo, R. and Bazzacco, D. and Benzoni, G. and Birkenbach, B. and Blasi, N. and Bottoni, S. and Brambilla, S. and Camera, F. and Ceruti, S. and Ciemala, M. and de Angelis, G. and Désesquelles, P. and Eberth, J. and Farnea, E. and Gadea, A. and Giaz, A. and Gorgen, A. and Gottardo, A. and Grebosz, J. and Hess, H. and Isocarte, R. and Jungclaus, A. and Leoni, S. and Ljungvall, J. and Lunardi, S. and Mazurek, K. and Menegazzo, R. and Mengoni, D. and Michelagnoli, C. and Milion, B. and Morales, A. I. and Napoli, D. R. and Nicolini, R. and Pellegri, L. and Pullia, A. and Quintana, B. and Recchia, F. and Reiter, P. and Rosso, D. and Salsac, M. D. and Siebeck, B. and Siem, S. and Soderstrom, P.-A. and Ur, C. and Valiente-Dobon, J. J. and Wieland, O. and Zieblinski, M. (2016) Pygmy dipole resonance in ^140Ce via inelastic scattering of ^17O. Physical Review C, 93 (4). pp. 44330-8. ISSN 2469-9985

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The γ decay from the high-lying states of ^140Ce excited via inelastic scattering of ^17O at a bombarding energy of 340 MeV was measured using the high-resolution AGATA-demonstrator array in coincidence with scattered ions detected in two segmented Δ E-E silicon detectors. Angular distributions of scattered ions and emitted γ rays were measured, as well as their differential cross sections. The excitation of 1^− states below the neutron separation energy is similar to the one obtained in reactions with the α isoscalar probe. The comparison between the experimental differential cross sections and the corresponding predictions using the distorted-wave Born approximation allowed us to extract the isoscalar component of identified 1^− pygmy states. For this analysis the form factor obtained by folding microscopically calculated transition densities and optical potentials was used.

Item Type: Article
Date: 25 April 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2016 American Physical Society. Received 22 December 2015; published 25 April 2016.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 19 May 2016 15:58
Last Modified: 29 Nov 2017 16:50

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