Methods and systems of treating a particle beam and performing mass spectroscopy
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United States of America Patent
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Nov 13, 2018
Grant Date -
Jun 1, 2017
app pub date -
Jun 26, 2015
filing date -
Jun 26, 2014
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Abstract
A method of treating a particle beam is disclosed, of interest in particular for mass spectrometry for 14C. A particle beam including positive ions is passed through a charge exchange cell containing a target gas. The target gas is electrically insulating at room temperature and pressure. At least some of the positive ions of the particle beam are converted to negative ions by interaction with the target gas. The particle beam incident at the charge exchange cell includes molecules and/or molecular ions which interact with the target gas to reduce the concentration of molecules as a result of repeated collisions with particles of the target gas. A corresponding mass spectrometry system is also disclosed.
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