New high-spin states of $^{142}_ {58}$Ce and $^{140}_{56}$Ba from fusion-fission reactions: Proton excitations in the N = 84 isotones - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles European Physical Journal A Year : 2007

New high-spin states of $^{142}_ {58}$Ce and $^{140}_{56}$Ba from fusion-fission reactions: Proton excitations in the N = 84 isotones

D. Curien
G. Duchene
B.J.P. Gall

Abstract

High-spin states in the $^{142}$Ce and $^{140}$Ba nuclei have been populated in the $^{12}$C + $^{238}$U and $^{18}$O + $^{208}$Pb fusion-fission reactions at 90 MeV and 85 MeV bombarding energy, respectively. The emitted $\gamma$-radiation was detected using the Euroball III and IV arrays. The high-spin yrast and near-to-yrast structures of $^{142}$Ce have been considerably extended. The level scheme of $^{140}$Ba has been extended by six new levels. The newly observed structures in these N = 84 isotones are discussed by analogy with the neighbouring nuclei.
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Dates and versions

in2p3-00244925 , version 1 (07-02-2008)

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T. Venkova, M.-G. Porquet, I. Deloncle, P. Petkov, A. Astier, et al.. New high-spin states of $^{142}_ {58}$Ce and $^{140}_{56}$Ba from fusion-fission reactions: Proton excitations in the N = 84 isotones. European Physical Journal A, 2007, 34, pp.349-353. ⟨10.1140/epja/i2007-10526-y⟩. ⟨in2p3-00244925⟩
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