Mass Spectroscopic Studies on the Mechanism of Ionization of Atoms Formed as a Result of Radioactive Decay Processe. I

Abstract

A specially designed mass spectrometer of a pulse counting mode has been constructed for studies on the chemical effect of nuclear transformations.The ion source has been examined by a beam experiment method using non-radioactive rare gas ions from an electron bombardment chamber. Measurements have been made of ion detection with 10 and 16 stage Cu-Be electron multipliers, the gains of which are 10⁶and10⁸, respectively. The results have shown that. a gain of at least 5×10⁴is needed for the so-called“one to one” pulse counting. Charge spectra of recoil ions from a-emitting nuclides have been also measured and discussed in connexion with the decay scheme.