MASS SPECTROMETER FOR THE ISOTOPIC ANALYSIS OF LITHIUM
A mass spectrometer was designed for the routine analysis lithium. Microgram samples lithium nitrate are ionized in a thermal ionization source. A 60 deg sector magnet anaiyzes the two ion beams that are collected simultaneously on two separate collectors. The source is pulsed and the two signals are a-c amplified and then subtracted from one another. The difference is displayed on a cathode-ray tube and the ratio is given rapidly by reading attenuation dials after adjusting for a null deflection. A calibration technique corrects for unequal transmission through the spectrometer and for inequalities in the circuitry. The precision of a single measurement of isotope ratio is plus or minus 0 .7%. (auth)
- Research Organization:
- Atomic Weapons Research Establishment, Aldermaston, Berks, Eng.
- NSA Number:
- NSA-15-011240
- OSTI ID:
- 4081310
- Journal Information:
- J. Sci. Instr., Journal Name: J. Sci. Instr. Vol. Vol: 38
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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