LOW-ENERGY COLLISIONS OF CF3- SCATTERING, CHEMICAL SPUTTERING, AND REACTIVE COLLISIONS( IONS WITH A HYDROCARBON COVERED SURFACE )

The interaction of CF3+ ions with a stainless steel surface covered wi th hydrocarbons has been studied with a recently constructed BESTOF ta ndem mass spectrometer as a function of the collision energy from abou t 0 up to 60 eV. Whereas the efficient reflection of projectile ions a t low collision energy and the efficient ejection of chemically sputte red ions at higher collision energies found here are in semiquantitati ve agreement with a previous report, results obtained here also demons trate that reactive ion surface collisions are an important feature of CF3+ impact on the hydrocarbon-covered surface leading to the formati on of various fluorohydrocarbon ions such as CH2F+, CH2CF+, and CHF2+. (Int J Mass Spectrom 177 (1998) 105-110) (C) 1998 Elsevier Science B. V.