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Lightest Isotope of Bh Produced via the 209Bi(52Cr,n)260Bh Reaction

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Lightest Isotope of Bh Produced via the 209Bi(52Cr,n)260Bh Reaction

S L Nelson et al. Phys Rev Lett.

Abstract

The lightest isotope of Bh was produced in the new 209Bi(52Cr,n)260Bh reaction at the Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Positive identification was made by observation of eight correlated alpha particle decay chains in the focal plane detector of the Berkeley Gas-Filled Separator. 260Bh decays with a 35(-9)(+19) ms half-life by alpha particle emission mainly by a group at 10.16 MeV. The measured cross section of 59(-20)(+29) pb is compared to model predictions. The influence of the N=152 and Z=108 shells on alpha decay properties is discussed.

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