| abstract |
A mass spectrometer having an ion source that produces a primary ion beam, the ion source having a heatable ion emitter, the ion emitter being coated with a liquid metal layer, Pure metallic bismuth or low melting point, mainly bismuth-containing alloys, which can emit bismuth ion mixed beams using ion emitter under the influence of electric field, and their mass from bismuth ion mixed beams Can be filtered as a pure ion beam of mass, one of a plurality of bismuth ion species that is a multiple of single or multiply charged bismuth ions Bi 1 P + of a single atom, It consists of only one type of Bi n P + ion, where n ≧ 2 and p ≧ 1, and n and p are each natural numbers. |