ON TERTIARY BOX+ - IONS IN HF-PLASMA SNMS

The effect of plasma electron impact on negative secondary ions is inv estigated by example of a sputtered H3BO3/Cu powder pellet. O-, BO-, B O+, and B+ tertiary ions, fractured from strongly forward focussed sec ondary BO2- ions, are identified by their kinetic energies. Since most of them are accepted by the ion optics, this process may affect quant ification in HF-plasma SNMS.