Observation of doubly-charged ions of francium isotopes extracted from a gas cell

Various isotopes of Ac, Ra, Fr, and Rn were produced by fusion-evaporation reactions using a 48Ca beam. The energetic ions were stopped in and extracted from a helium gas cell. The extracted ions were identified using a multi-reflection time-of-fight mass spectrograph. In all cases, it was observed...

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Published inNuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 407; pp. 160 - 165
Main Authors Schury, P., Wada, M., Ito, Y., Kaji, D., Haba, H., Hirayama, Y., Kimura, S., Koura, H., MacCormick, M., Miyatake, H., Moon, J.Y., Morimoto, K., Morita, K., Murray, I., Ozawa, A., Rosenbusch, M., Reponen, M., Takamine, A., Tanaka, T., Watanabe, Y.X., Wollnik, H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.09.2017
Subjects
Charge state
Fusion-evaporation
Gas cells
MRTOF-MS
Radioactive ions
Superheavy elements
Superheavy elements
Fusion-evaporation
Gas cells
Charge state
Radioactive ions
MRTOF-MS
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Summary:Various isotopes of Ac, Ra, Fr, and Rn were produced by fusion-evaporation reactions using a 48Ca beam. The energetic ions were stopped in and extracted from a helium gas cell. The extracted ions were identified using a multi-reflection time-of-fight mass spectrograph. In all cases, it was observed that the predominant charge state for the extracted ions, including the alkali Fr, was 2+.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2017.06.014