Evidence of octupole-phonons at high spin in <sup>207</sup>Pb
- Ralet, D.
- Clément, E.
- Georgiev, G.
- Stuchbery, A.E.
- Rejmund, M.
- Van Isacker, P.
- de France, G.
- Lemasson, A.
- Ljungvall, J.
- Michelagnoli, C.
- Navin, A.
- Balabanski, D.L.
- Atanasova, L.
- Blazhev, A.
- Bocchi, G.
- Carroll, R.
- Dudouet, J.
- Dupont, E.
- Fornal, B.
- Franchoo, S.
- Fransen, C.
- Müller-Gatermann, C.
- Goasduff, A.
- Gadea, A.
- John, P.R.
- Kocheva, D.
- Konstantinopoulos, T.
- Korichi, A.
- Kusoglu, A.
- Lenzi, S.M.
- Leoni, S.
- Lozeva, R.
- Maj, A.
- Perez, R.
- Pietralla, N.
- Shand, C.
- Stezowski, O.
- Wilmsen, D.
- Yordanov, D.
- Barrientos, D.
- Bednarczyk, P.
- Birkenbach, B.
- Boston, A.J.
- Boston, H.C.
- Burrows, I.
- Cederwall, B.
- Ciemala, M.
- Collado, J.
- Crespi, F.
- Cullen, D.
- Eberth, H.J.
- Goupil, J.
- Harkness, L.
- Hess, H.
- Jungclaus, A.
- Korten, W.
- Labiche, M.
- Menegazzo, R.
- Mengoni, D.
- Million, B.
- Nyberg, J.
- Podolyak, Zs.
- Pullia, A.
- Quintana Arnés, B.
- Recchia, F.
- Reiter, P.
- Saillant, F.
- Salsac, M.D.
- Sanchis, E.
- Theisen, C.
- Valiente Dobon, J.J.
- Wieland, O.
DOIAbstract
A lifetime measurement of the 19/2¯ state in 207Pb has been performed using the Recoil Distance Doppler-Shift (RDDS) method. The nuclei of interest were produced in multi-nucleon transfer reactions induced by a 208Pb beam impinging on a 100Mo enriched target. The beam-like nuclei were detected and identified in terms of their atomic mass number in the VAMOS++ spectrometer while the prompt γ rays were detected by the AGATA tracking array. The measured large reduced transition probability B(E3, 19/2¯ → 13/2⁺) = 40(8) W.u. is the first indication of the octupole phonon at high spin in 207Pb. An analysis in terms of a particle-octupole-vibration coupling model indicates that the measured B(E3) value in 207Pb is compatible with the contributions...
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