Discovery of the barium isotopes

Current status and future potential of nuclide discoveries

“…Although not impossible it is unlikely that further nuclides will exist for which characteristic resonance parameters can be measured. 63 Se not measured 35 68 Br not measured, but 69 Br unbound 36 68 Kr not measured 37 72 Rb not measured, but 73 Rb unbound 38 72 Sr not measured 39 75 Y not measured 40 77 Zr not measured 41 81 Nb Z. Janas 1999 GANIL [150] 42 82 Mo not measured 43 85 Tc Z. Janas 1999 GANIL [150] For neutron rich nuclei characteristic properties of at least two isotopes beyond the neutron dripline have been identified for the lightest elements, hydrogen, helium and lithium. Neutron rich nuclides between beryllium and magnesium which have been shown or expected to be unbound but have not been observed are listed in Table 5.…”

“…Not measured 43 85 Tc Z Janas et al 1999 GANIL [150] Table 5. Nuclides beyond the neutron dripline which have been demonstrated to be unbound or have not been reported yet.…”

Discoveries of isotopes by fission

“…(Concerning the other from uranium produced barium isotopes, it is hypothesized that Ba IV may be the parent of the radioactive lanthanum which was reported with a half-life of 3146 h with the probable atomic weight of 140.) [12,15].…”