• Citer

178Hg and asymmetric fission of neutron-deficient pre-actinides

par Jhingan, A.;Schmitt, Christelle;Lemasson, Alban;Biswas, Sovan;Kim, Y.H.;Ramos, D.;Andreyev, Andrei;Curien, Dominique;Ciemała, M.;Clément, E.;Dorvaux, O.;De Canditiis, B.;Didierjean, F.;Duchene, D.;Dudouet, J;Frankland, J.;Fremont, G.;Goupil, J.;Jacquot, B;Raison, C.;Ralet, D.;Retailleau, B.-M.;Stuttge, Louise;Tsekhanovich, I.;Andreev, A.V.;Goriely, Stéphane ;Hilaire, Stéphane;Lemaître, Jean-François ;Moller, P.;Schmidt, K.-H.
Référence Physical Review C, 106, page (044607)
Publication Publié, 2022-10-19

Article révisé par les pairs

• Accès en ligne
• Détails
• Contenu
• Statistiques

Résumé :

Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nucleardynamics. While the importance of structural effects in the nascent fragments is well established in the(trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides canbe explained by various mechanisms. To deepen our insight into that puzzle, an innovative approach basedon inverse kinematics and an enhanced version of the VAMOS++ heavy-ion spectrometer was implementedat the GANIL facility, Caen. Fission of 178Hg was induced by fusion of 124Xe and 54Fe. The two fragmentswere detected in coincidence using VAMOS++ supplemented with a new SEcond Detection arm. For the firsttime in the pre-actinide region, access to the pre-neutron mass and total kinetic energy distributions, and thesimultaneous isotopic identification of one the fission fragment, was achieved. The present work describes theexperimental approach, and discusses the pre-neutron observables in the context of an extended asymmetricfissionisland located southwest of 208Pb. A comparison with different models is performed, demonstrating theimportance of this new asymmetric-fission island for elaborating on driving effects in fission.