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Mass spectrometer method for determining parts per billion helium-3 in helium. Report of investigations, 1976

Technical Report ·
OSTI ID:7340752
;
There has been developed a mass spectrometer method for determining the helium-3 content of high-purity helium. The work was done in order to evaluate experimental methods for removing helium-3 from high-purity helium and to better determine the composition of pure helium used in research. This was accomplished by increasing the inlet sample pressure, ionizing current, and amplification of the current produced by the ions collected on a conventional mass spectrometer that had been modified. With these modifications, the helium-3 content was determined in the parts per million and parts per billion range in helium-4. (GRA)
Research Organization:
Bureau of Mines, Amarillo, Tex. (USA)
OSTI ID:
7340752
Report Number(s):
PB-252474; BM-RI-8119
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
CRYOGENIC FLUIDS
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
HELIUM
HELIUM 3
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MASS SPECTROSCOPY
NONMETALS
NUCLEI
PURIFICATION
RARE GASES
SPECTROSCOPY
STABLE ISOTOPES
TRACE AMOUNTS