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Evidence of octupole-phonons at high spin in 207Pb

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. and Wieland, O. (2019) Evidence of octupole-phonons at high spin in 207Pb Physics Letters B, 797, 134797. pp. 1-6.

Evidence of octupole-phonons at high spin in 207Pb.pdf - Accepted version Manuscript

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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 from single-phonon and single particle E3 as well as E3 strength arising from the double-octupole-phonon state, all adding coherently. A crucial aspect of the coupling model, namely the strong mixing between single-hole and the phonon-hole states, is confirmed in a realistic shell-model calculation.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
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.
Pullia, A.
Quintana Arnés, B.
Recchia, F.
Reiter, P.
Saillant, F.
Salsac, M.D.
Sanchis, E.
Theisen, C.
Valiente Dobon, J.J.
Wieland, O.
Date : 24 July 2019
Funders : European Commission 7th Framework Programme
DOI : 10.1016/j.physletb.2019.134797
Grant Title : ENSAR
Copyright Disclaimer : Crown Copyright © 2019 Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
Uncontrolled Keywords : AGATA spectrometer; γ-Ray tracking; VAMOS++ spectrometer; Plunger device; Nuclear deformation; Octupole phonon
Depositing User : Clive Harris
Date Deposited : 31 Jul 2019 08:30
Last Modified : 22 Oct 2019 12:00

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