Abstract
Following the α decay of 233U, 229Th recoil ions are shown to be extracted in a significant amount from the MLL buffer-gas stopping cell. The produced recoil ions and subsequent daughter nuclei are mass purified with the help of a customized quadrupole mass spectrometer. The combined extraction and mass purification efficiency for 229Th3+ is determined via MCP-based measurements and via the direct detection of the 229Th α decay. A large value of (10±2)% for the combined extraction and mass purification efficiency of 229Th3+ is obtained at a mass resolution of about 1u/e. In addition to 229Th, also other α-recoil ions of the 233, 232U decay chains are addressed.
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v.d. Wense, L., Seiferle, B., Laatiaoui, M. et al. Determination of the extraction efficiency for 233U source α-recoil ions from the MLL buffer-gas stopping cell. Eur. Phys. J. A 51, 29 (2015). https://doi.org/10.1140/epja/i2015-15029-8
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DOI: https://doi.org/10.1140/epja/i2015-15029-8