The properties of pygmy dipole states in Pb208 were investigated using the Pb208(O17, O17’γ) reaction at 340 MeV and measuring the γ decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted γ rays and of the scattered particles were measured. The results are compared with (γ, γ′) and (p, p′) data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2+ and 3− states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1− excited states from 4 to 8 MeV.

Isospin character of low-lying pygmy dipole states in Pb208 via inelastic scattering of O17 ions

Giaz A;
2014-01-01

Abstract

The properties of pygmy dipole states in Pb208 were investigated using the Pb208(O17, O17’γ) reaction at 340 MeV and measuring the γ decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted γ rays and of the scattered particles were measured. The results are compared with (γ, γ′) and (p, p′) data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2+ and 3− states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1− excited states from 4 to 8 MeV.
2014
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.012501
Crespi, F. C. L.; Bracco, A; Nicolini, R; Mengoni, D; Pellegri, L; Lanza, E. G.; Leoni, S; Maj, A; Kmiecik, M; Avigo, R; Benzoni, G; Blasi, N; Boiano, C; Bottoni, S; Brambilla, S; Camera, F; Ceruti, S; Giaz, A; Million, B; Morales, A. I.; Vandone, V; Wieland, O; Bednarczyk, P; Ciema\u0142a, M; Grebosz, J; Krzysiek, M; Mazurek, K; Zieblinski, M; Bazzacco, D; Bellato, M; Birkenbach, B; Bortolato, D; Calore, E; Cederwall, B; Charles, L; De Angelis, G; Désesquelles, P; Eberth, J; Farnea, E; Gadea, A; Görgen, A; Gottardo, A; Isocrate, R; Jolie, J; Jungclaus, A; Karkour, N; Korten, W; Menegazzo, R; Michelagnoli, C; Molini, P; Napoli, D. R.; Pullia, A; Recchia, F; Reiter, P; Rosso, D; Sahin, E; Salsac, M. D.; Siebeck, B; Siem, S; Simpson, J; Söderström P., -A; Stezowski, O; Theisen, Ch; Ur, C; Valiente-Dobón, J. J.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2101550
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