First successful ionization of Lr (Z = 103) by a surface-ionization technique

Tetsuya K Sato; Nozomi Sato; Masato Asai; Kazuaki Tsukada; Atsushi Toyoshima; Kazuhiro Ooe; Sunao Miyashita; Matthias Schädel; Yusuke Kaneya; Yuichiro Nagame; Akihiko Osa; Shin-ichi Ichikawa; Thierry Stora; Jens Volker Kratz

doi:10.1063/1.4789772

First successful ionization of Lr (Z = 103) by a surface-ionization technique

Rev Sci Instrum. 2013 Feb;84(2):023304. doi: 10.1063/1.4789772.

Authors

Tetsuya K Sato¹, Nozomi Sato, Masato Asai, Kazuaki Tsukada, Atsushi Toyoshima, Kazuhiro Ooe, Sunao Miyashita, Matthias Schädel, Yusuke Kaneya, Yuichiro Nagame, Akihiko Osa, Shin-ichi Ichikawa, Thierry Stora, Jens Volker Kratz

Affiliation

¹ Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata-shirane, Tokai-mura, Ibaraki 319-1195, Japan. sato.tetsuya@jaea.go.jp

PMID: 23464201
DOI: 10.1063/1.4789772

Abstract

We have developed a surface ionization ion-source as part of the JAEA-ISOL (Isotope Separator On-Line) setup, which is coupled to a He/CdI2 gas-jet transport system to determine the first ionization potential of the heaviest actinide lawrencium (Lr, Z = 103). The new ion-source is an improved version of the previous source that provided good ionization efficiencies for lanthanides. An additional filament was newly installed to give better control over its operation. We report, here, on the development of the new gas-jet coupled surface ion-source and on the first successful ionization and mass separation of 27-s (256)Lr produced in the (249)Cf + (11)B reaction.