Synthesis, Decay Properties, and Identification of Superheavy Nuclei Produced in {sup 48}Ca-induced Reactions

Journal Article · Fri Oct 26 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2813815· OSTI ID:21036041

Oganessian, Yu Ts; Utyonkov, V K; Lobanov, Yu V; Abdullin, F Sh; Polyakov, A N; Sagaidak, R N; Shirokovsky, I V; Tsyganov, Yu S; Voinov, A A; Iliev, S; Subbotin, V G; Sukhov, A M; Gulbekian, G G; Bogomolov, S L; Gikal, B N; Mezentsev, A N; Subotic, K; Zagrebaev, V I; Itkis, M G ^[1]; Moody, K J ^[2]

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1. Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
2. University of California, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

Thirty-four new nuclides with Z = 104-116, 118 and N = 161-177 have been synthesized in the complete-fusion reactions of {sup 238}U, {sup 237}Np, {sup 242,244}Pu, {sup 243}Am, {sup 245,248}Cm, and {sup 249}Cf targets with {sup 48}Ca beams. The masses of evaporation residues were identified through measurements of the excitation functions of the xn-evaporation channels and from cross bombardments. The decay properties of the new nuclei agree with those of previously known heavy nuclei and with predictions from different theoretical models. A discussion of self-consistent interpretations of all observed decay chains originating from the parent isotopes {sup 282,283}112, {sup 282}113, {sup 286-289}114, {sup 287,288}115, {sup 290-293}116, and {sup 294}118 is presented. Decay energies and lifetimes of the neutron-rich superheavy nuclei as well as their production cross sections indicate a considerable increase in the stability of nuclei with the approach to the theoretically predicted nuclear shells with N = 184 and Z = 114.

• OSTI ID: 21036041
• Journal Information: AIP Conference Proceedings, Vol. 947, Issue 1; Conference: 7. Latin American symposium on nuclear physics and applications, Cusco (Peru), 11-16 Jun 2007; Other Information: DOI: 10.1063/1.2813815; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMERICIUM 243 TARGET
CALCIUM 48 REACTIONS
CALIFORNIUM 249 TARGET
CURIUM 248 TARGET
ELEMENT 112
ELEMENT 113
ELEMENT 114
ELEMENT 115
ELEMENT 116
EXCITATION FUNCTIONS
LIFETIME
NEPTUNIUM 237 TARGET
NEUTRONS
NUCLEAR DECAY
PLUTONIUM 244 TARGET
SHELL MODELS
URANIUM 238 TARGET