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A comparison of ion emission from NaNO 3 produced by keV energy atomic and polyatomic primary ions
Author(s) -
Stipdonk M. J. Van,
Justes D. R.,
Santiago V.,
Schweikert E. A.
Publication year - 1998
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19981115)12:21<1639::aid-rcm374>3.0.co;2-2
Subject(s) - polyatomic ion , chemistry , ion , primary (astronomy) , atomic physics , physics , organic chemistry , astronomy
Sodium nitrate was bombarded with Cs + , (CsI)Cs + and (CsI) 2 Cs + projectiles in the energy range 10 to 20 keV. Measurements of relative secondary ion yields demonstrate that Cs + produces a greater abundance of O − and OH − from the surface; the yields of complex secondary ions are higher using the polyatomic projectiles. The yield ratio of NO 3 − to NO 2 − , indicative of chemical damage induced by the projectile impact, is not sensitive to the kinetic energy of the projectile in the energy range examined, but is instead a function of the number of atoms in the projectile. For surface analysis, this study shows that the most effective polyatomic projectile is one composed of a few constituents. © 1998 John Wiley & Sons, Ltd.