Abstract.
A carbon-cluster ion source has been installed and tested at SHIPTRAP, the Penning-trap mass spectrometer for precision mass measurements of heavy elements at GSI. Carbon-cluster ions 12Cn +, 5 ≤n ≤23, were produced by laser-induced desorption and ionization from a carbon sample. They were tested for the first time as reference ions in an on-line mass measurement of the radionuclides 144Dy, 146Dy and 147Ho. In addition, carbon clusters of various sizes were used for an investigation of the systematic uncertainty of SHIPTRAP covering a mass range from 84 u to 240 u. The mass-dependent uncertainty was found to be negligible for the case of (m-m ref)< 100 u. However, a systematic uncertainty of 4.5 ×10-8 was revealed.
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Chaudhuri, A., Block, M., Eliseev, S. et al. Carbon-cluster mass calibration at SHIPTRAP. Eur. Phys. J. D 45, 47–53 (2007). https://doi.org/10.1140/epjd/e2007-00001-5
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DOI: https://doi.org/10.1140/epjd/e2007-00001-5