Hyper-filter-fluorescer spectrometer for x-rays above 120 keV
US4393512A · kind A · utility
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9Claims
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Key dates
| Filing date | Jul 7, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jul 7, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/076
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus utilizing filter-fluorescer combinations is provided to measure short bursts of high fluence x-rays above 120 keV energy, where there are no practical absorption edges available for conventional filter-fluorescer techniques. The absorption edge of the prefilter is chosen to be less than that of the fluorescer, i.e., E.sub.PRF <E.sub.F, contrary to the prior art technique E.sub.PRF >E.sub.F. In this way, the response function is virtually zero between E.sub.PRF and E.sub.F and well defined and enhanced in an energy band of less than 1000 keV above the 120 keV energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.