Isotope analysis
US4258427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1979 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Apr 18, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The difference in concentration of a selected isotope in two materials is measured by directing gaseous beams of the materials towards the inlet of a mass spectrometer. A shutter alternately blocks transmission of the two beams. Means is also provided for blocking either of the two beams for any period of time desired. Provision is made for automatically passing either one of the gaseous beams or both of the gaseous beams through the shutter to the mass spectrometer. The output signal from the mass spectrometer is passed to a synchronous detector as is a reference signal which is representative of the speed of operation of the shutter. The output signal from the synchronous detector is representative of the concentration of the selected isotope in a first material if only the gaseous beam of the first material is being passed through the shutter to the mass spectrometer. The output signal from the synchronous detector is representative of the concentration of the selected isotope in the second material if only the gaseous beam of the second material is being passed through the shutter to the mass spectrometer. The output signal from the synchronous detector is representative of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.