Investigation of Thermionic Emission Ion Sources for the Isotope Analysis of Lithium
- New Brunswick Laboratory (NBL), New Brunswick, NJ (United States)
A mass-spectrometric procedure using a triple-filament, thermal-emission ion source for the analysis of lithium was developed. Five portions of an isotope reference sample No. 9 (NBS) of lithium carbonate were converted to the nitrate form and analyzed using two types of ion sources and two sample holders. It was found that a triple filament ion source with a 0.005-in.-diameter tungsten wire as an ionizing filament and a 0.060 in wide, 11/16 in. long, and 0.008 in. thick Nichrome sample holder is the most desirable. A steady ion current is achieved in about fifteen minutes. The precision of the measured atom% Li6 is 0.018 (standard deviation). The standard deviation between charges is 0.05.
- Research Organization:
- New Brunswick Laboratory (NBL), New Brunswick, NJ (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- NSA Number:
- NSA-18-008280
- OSTI ID:
- 4113132
- Report Number(s):
- NBL--205
- Country of Publication:
- United States
- Language:
- English
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