Experiments on chemical concentration of a new spontaneously fissile nuclide from material of the Allende meteorite

On the assumption that the new nuclide belongs to the superheavy elements, the meteorite material was heated in a flux of hydrogen and oxygen to 1000/sup 0/C and the sublimed products were collected. Under these conditions we extracted the chemical homologs of elements 112--118 and other known volatile elements. The spontaneously fissile activity of the sublimate, measured by means of proportional counters, amounted to about 0.02 decay/day per kg of meteorite material. This is close to the data of Flerov et al. obtained in measurement of the activity of the new emitter in the initial material of the Allende meteorite by means of multiple neutron emission counters.