Selective mass separation of light lanthanoids by means of ionization of their monoxides

https://doi.org/10.1016/0168-9002(89)90389-6Get rights and content

Abstract

To strengthen elemental selectivity in isotope separation on-line, ionization of the monoxides of light lanthanoids in a thermal ion source has been studied. Currents of the monoxide ion MO+ and the metallic ion M+ were measured in off-line experiments using oxide reagents of the elements from Ba to Sm at ion-source temperatures from 1900 to 2730 K. The observed MO+M+ ratio was the highest for La and Ce, and decreased with increasing atomic number and temperature. In on-line experiments using heavy-ion fusion-evaporation reactions, La isotopes were mass-separated as La16O+, being well separated from the Cs and Ba isobars, while Pr isotopes were obtained at a higher temperature as Pr+ since the La and Ce isobars were still ionized favorably as MO+. Using this method, the isotope 121La was newly identified with a half-life of 5.3 ± 0.2 s.

References (19)

  • R. Kirchner et al.

    Nucl. Instr. and Meth.

    (1986)
  • R. Kirchner

    Nucl. Instr. and Meth.

    (1987)
  • A. Plantier et al.

    Nucl. Instr. and Meth.

    (1987)
  • J.C. Putaux et al.

    Nucl. Instr. and Meth.

    (1981)
  • Long-Den Nguyen et al.

    Int. J. Mass Spectrom. Ion Phys.

    (1972)
  • B.R. Nielsen

    Nucl. Instr. and Meth.

    (1981)
  • G.J. Beyer et al.

    Nucl. Instr. and Meth.

    (1971)
  • A. Latuszynski et al.

    Nucl. Instr. and Meth.

    (1975)
  • R. Kirchner et al.

    Nucl. Instr. and Meth.

    (1978)
There are more references available in the full text version of this article.

Cited by (0)

View full text