Atomic line emission analyzer for hydrogen isotopes

Details Atomic line emission analyzer for hydrogen isotopes Atomic line emission analyzer for hydrogen isotopes

1991-05-08

1993-03-30

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356326, 356328, G01J 330

Patent

active

051988704

ABSTRACT:
Apparatus for isotopic analysis of hydrogen comprises a low pressure chamber into which a sample of hydrogen is introduced and then exposed to an electrical discharge to excite the electrons of the hydrogen atoms to higher energy states and thereby cause the emission of light on the return to lower energy states, a Fresnel prism made at least in part of a material anomalously dispersive to the wavelengths of interest for dispersing the emitted light, and a photodiode array for receiving the dispersed light. The light emitted by the sample is filtered to pass only the desired wavelengths, such as one of the lines of the Balmer series for hydrogen, the wavelengths of which differ slightly from one isotope to another. The output of the photodiode array is processed to determine the relative amounts of each isotope present in the sample. Additionally, the sample itself may be recovered using a metal hydride.

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