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

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]]...

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Published in:Physical review letters 1999-10, 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: Article
Language:English
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-)
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Summary: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 ]
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.83.3154