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Low-Z boundary of the N = 88-90 shape phase transition: 148Ce near the critical point

Koseoglou, P., Werner, V., Pietralla, N., Ilieva, S., Nikšić, T., Vretenar, D., Alexa, P., Thűrauf, M., Bernards, C., Blanc, A. , Bruce, A. M., Cakirli, R. B., Cooper, N., Fraile, L. M., de France, G., Jentschel, M., Jolie, J., Kőster, U., Korten, W., Krőll, T., Lalkovski, S., Mach, H., Mărginean, N., Mutti, P., Patel, Z., Paziy, V., Podolyak, Zs., Regan, P. H., Régis, J.-M., Roberts, O. J., Saed-Samii, N., Simpson, G. S., Soldner, T., Ur, C. A., Urban, W., Wilmsen, D. and Wilson, E. (2019) Low-Z boundary of the N = 88-90 shape phase transition: 148Ce near the critical point Physical Review C.

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Excited states of the neutron-rich nucleus 148Ce have been populated by neutron-induced fission of 235U and 241Pu samples. Their electromagnetic decays were studied by means of γ-ray coincidence spectroscopy with fast-timing capabilities. Lifetimes of the 2+1 and 4+1 states of 148Ce were obtained and their E2 decay rates deduced. The B4=2 = B(E2; 4+1 → 2+1)=B(E2; 2+1 → 0+1) ratio indicates that 148Ce is a transitional nucleus while the N = 88/90 shape phase transition evolves into a gradual change of nuclear deformation for proton numbers Z < 60.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Koseoglou, P.
Werner, V.
Pietralla, N.
Ilieva, S.
Nikšić, T.
Vretenar, D.
Alexa, P.
Thűrauf, M.
Bernards, C.
Blanc, A.
Bruce, A. M.
Cakirli, R. B.
Cooper, N.
Fraile, L. M.
de France, G.
Jentschel, M.
Jolie, J.
Kőster, U.
Korten, W.
Krőll, T.
Lalkovski, S.
Mach, H.
Mărginean, N.
Mutti, P.
Patel, Z.
Paziy, V.
Regan, P. H.
Régis, J.-M.
Roberts, O. J.
Saed-Samii, N.
Simpson, G. S.
Soldner, T.
Ur, C. A.
Urban, W.
Wilmsen, D.
Wilson, E.
Date : 21 November 2019
Funders : STFC, UK Department of Business, Energy and Industrial Strategy (BEIS)
Copyright Disclaimer : Copyright 2019 The Authors.
Additional Information : Facilities Council (STFC) via grants STnL0057n1 and STnP005314n1. PH Regan acknowledges partial support from the UK Department of Business, Energy and Industrial Strategy (BEIS) via the National Measurement System (NMS). PA acknowledges support from SP2018/84
Depositing User : Diane Maxfield
Date Deposited : 11 Dec 2019 15:33
Last Modified : 11 Dec 2019 15:33

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