An evaluation of coincidental secondary ion emission from keV mono- and polyatomic projectile impacts
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Coincidental secondary ion emission yields were analyzed as a function of projectile characteristics. The efficient application of coincidental ion mass spectrometry (CIMS) required selection of a projectile maximizing coincidental SI emission. The projectiles were produced with fission fragments from a 252Cf source striking an aluminized mylar foil coated with a vapor deposited layer of CsI. The ions desorbed off the CsI were accelerated, mass-separated, and detected in a second time of flight (TOF) analyzer. Enhanced SI yields were obtained with polyatomic keV projectiles.