Low-Z boundary of the N=88-90 shape phase transition: Ce-148 near the critical point
Date
2020Author
Blanc, A.
de France, G.
Jentschel, M.
Jolie, J.
Koster, U.
Korten, W.
Kroell, T.
Lalkovski, S.
Mach, H.
Marginean, N.
Mutti, P.
Patel, Z.
Paziy, V
Podolyak, Zs
Regan, P. H.
Regis, J-M
Roberts, O. J.
Saed-Samii, N.
Simpson, G. S.
Soldner, T.
Ur, C. A.
Urban, W.
Wilmsen, D.
Wilson, E.
Cakirli, Rabia Burcu
Koseoglou, P.
Werner, V
Pietralla, N.
Ilieva, S.
Niksic, T.
Vretenar, D.
Alexa, P.
Thuerauf, M.
Bernards, C.
Bruce, A. M.
Cooper, N.
Fraile, L. M.
Metadata
Show full item recordAbstract
Excited states of the neutron-rich nucleus Ce-148 have been populated by neutron-induced fission of a U-235 target. Its electromagnetic decays were studied by means of gamma-ray coincidence spectroscopy with fast-timing capabilities. Lifetimes of the 2(1)(+) and 4(1)(+) states of Ce-148 were obtained and their E2 decay rates deduced. The B-4/2 = B(E2; 4(1)(+) -> 2(1)(+))/B(E2; 2(1)(+) -> 0(1)(+)) ratio indicates that Ce-148 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.
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