Synthesis of Superheavy Nuclei in the [sup 48]Ca + [number sign] [sup 244]Pu Reaction

• Published in: Physical review letters Vol. 83:16
• Main Authors: Oganessian, Y.T., Utyonkov, V.K., Lobanov, Y.V., Abdullin, F.S., Polyakov, A.N., Shirokovsky, I.V., Tsyganov, Y.S., Gulbekian, G.G., Bogomolov, S.L., Gikal, B.N., Mezentsev, A.N., Iliev, S., Subbotin, V.G., Sukhov, A.M., Buklanov, G.V., Subotic, K., Itkis, M.G., Moody, K.J., Wild, J.F., Stoyer, N.J., Stoyer, M.A., Lougheed, R.W.
• Format: Journal Article
• Language: English
• Published: United States 01-10-1999
• Subjects: ACTINIDES; ALKALINE EARTH METALS; ALPHA DECAY; CALCIUM; CALCIUM 48 REACTIONS; CHARGED-PARTICLE REACTIONS; DECAY; ELEMENTS; FISSION; HEAVY ION REACTIONS; HEAVY NUCLEI; LIFETIME; METALS; NUCLEAR DECAY; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEI; PLUTONIUM; PLUTONIUM 244 TARGET; SPONTANEOUS FISSION; TARGETS; TRANSURANIUM ELEMENTS 663450 > Heavy-Ion-Induced Reactions & Scattering > (1992-)
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.83.3154

In bombardment of [sup 244]Pu with [sup 48]Ca , we observed a decay sequence consisting of an implanted heavy atom, three subsequent [alpha] decays, and a spontaneous fission (SF), all correlated in time and position. The measured [alpha] energies and corresponding time intervals were E[sub [alpha]]=9.71 thinspthinspMeV ([Delta]t=30.4 thinspthinsps), 8.67thinspthinspMeV ([Delta]t=15.4 thinspthinspmin), and 8.83thinspthinspMeV ([Delta]t=1.6 thinspthinspmin); for the SF ([Delta]t=16.5 thinspthinspmin), the total deposited energy was approximately 190thinspthinspMeV. The [alpha] -particle energies together with the decay times and SF terminating the chain offer evidence of the decay of nuclei with high atomic numbers. This decay chain is a good candidate for originating from the [alpha] decay of the parent nucleus [sup 289]114 , produced with a cross section of about 1thinspthinsppb. [copyright] [ital 1999] [ital The American Physical Society ]