Development of an atomic beam apparatus for chemistry of the heaviest elements

Tomitsuka, Tomohiro*; Tokoi, Katsuyuki*; Sato, Tetsuya   ; Asai, Masato  ; Chiera, N. M.; Goto, Shinichi*; Osa, Akihiko  ; Toyoshima, Atsushi; Tsukada, Kazuaki  ; Nagame, Yuichiro 

We plan to directly determine the ground-state configuration of Lr by applying the Stern-Gerlach technique of magnetic deflection of atomic beams. Here, a well-collimated atomic beam passes through an inhomogeneous magnetic field that splits the beam into (2J + 1) components; J is the total electronic angular momentum of the atom. From the number of beam split components, the ground-state configuration of the Lr atom can be determined unambiguously. We have just started the development of an apparatus for effective extraction of the atomic Lr beam by exploiting a small cavity type atomic beam source that can be heated by electron bombardment. In the contribution, we present the status and achievement, and future prospect of this program.