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RESEARCH PRODUCT
New nuclideHa263
K. R. CzerwinskiH. P. ZimmermannJ. KovacsMatti NurmiaAlfred P. WeberM. K. GoberW. BrüchleN. J. HanninkDarleane C. HoffmanAndreas TürlerD.t. JostJ. V. KratzB. KadkhodayanDiana LeeE. SchimpfHeinz W. GäggelerMatthias SchädelU. W. SchererKenneth E. Gregorichsubject
PhysicsNuclear reactionNuclear and High Energy PhysicsFissionNuclear TheoryKinetic energyIonNuclear physicsCrystallographyAlpha decayNuclideNuclear ExperimentRadioactive decaySpontaneous fissiondescription
A new nuclide $^{263}\mathrm{Ha}$ was produced in the bombardment of a $^{249}\mathrm{Bk}$ target with 93-MeV $^{18}\mathrm{O}$ ions. It was detected via spontaneous fission counting and was shown to have a half-life of about 0.5 min. This activity was also separated from the reaction products by automated rapid chemical separations using cation-exchange chromatography in 0.05M \ensuremath{\alpha}-hydroxyisobutyric acid. After chemical separation, $^{263}\mathrm{Ha}$ was found to decay by spontaneous fission (${57}_{\mathrm{\ensuremath{-}}15}^{+13}$%) and by \ensuremath{\alpha} emission (${\mathit{E}}_{\mathrm{\ensuremath{\alpha}}}$=8.35 MeV, 43%) with a half-life of ${27}_{\mathrm{\ensuremath{-}}7}^{+10}$ s. The spontaneous fission fragment energy spectrum is compatible with an average total kinetic energy of about 200 MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-03-01 | Physical Review C |