Synthesis of element 108

    Hassium is a synthetic element in the periodic table that has the symbol Hs and atomic number 108.

    "...Thus the spontaneously fissioning activity observed is associated with the formation of the isotope 264108 in the reactions 208Pb(58Fe, 2n) and 207Pb(58Fe, n). The time distribution of spontaneous fission fragment tracks in the reactions 207,208Pb + 58Fe does not differ from that observed in the reaction 208Pb + 54Cr.

Element 108
    Bearing in mind that the expected α-decay half-life of the isotope 264108 (Ref. 6) is smaller than the value measured by detecting spontaneous fission we arrive at the rather essential conclusion that the even-even isotope 264108 undergoes mainly α-decay followed by the formation of the daughter α-emitter 260106 and the spontaneously fissioning granddaughter nuclide 256104, i.e.
                    α                   α
    264108 ---> 260106 ---> 256104(SF).
    This indicates that in the given decay chain the stability of nuclei with Z=106, 108 against spontaneous fission turns out to be comparable to (or possibly even higher than) that of the nucleus 256104. ..."

    From "On the Stability of the Nuclei of Element 108 with A = 263-265" Yu.Ts. Oganessian, A.G. Demin, M. Hussonnois, S.P.Tretyakova, Yu.P. Kharitonov, V.K. Utyonkov, I.V. Shirokovsky, O. Constantinescu, H. Bruchertseifer, Yu.S. Korotkin. Zs.Physik A319(1984)215-217
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    "Experimental Studies of the Formation and Radioactive Decay of Isotopes with Z=104-109" Yu.Ts.Oganessian, M.Hussonnois, A.G.Demin, Yu.P.Kharitonov, H.Bruchertseifer, O.Constantinescu, Yu.S.Korotkin, S.P.Tretyakova, V.K.Utyonkov, I.V.Shirokovsky and J.Estevez, JINR E2-84-651 (1984), p.4-7
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