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

Koseoglou, P.; Werner, V; Pietralla, N.; Ilieva, S.; Niksic, T.; Vretenar, D.; Alexa, P.; Thuerauf, M.; Bernards, C.; Blanc, A.; Bruce, A.; Cakirli, Rabia; Cooper, N.; Fraile, L.; 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.; Regis, J-M; Roberts, O.; Saed-Samii, N.; Simpson, G.; Soldner, T.; Ur, C.; Urban, W.; Wilmsen, D.; Wilson, E.

doi:10.1103/physrevc.101.014303

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

Atıf İçin Kopyala

Koseoglou P., Werner V., Pietralla N., Ilieva S., Niksic T., Vretenar D., ...Daha Fazla

PHYSICAL REVIEW C, cilt.101, sa.1, 2020 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 101 Sayı: 1
Basım Tarihi: 2020
Doi Numarası: 10.1103/physrevc.101.014303
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC
İstanbul Üniversitesi Adresli: Evet

Özet

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.