Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1978-01-06
1980-02-12
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
250458, 250459, 331 945G, G01J 330
Patent
active
041881206
ABSTRACT:
The invention involves the measurement of the concentration of the radioisotope .sup.129 I.sub.2 in the presence of a gas. The invention uses a laser to excite a sample of the .sup.129 I.sub.2 in a sample gas chamber and a reference sample of a known concentration of .sup.129 I.sub.2 in a reference gas chamber. The .sup.129 I.sub.2 in the sample and reference gas chamber each gives off fluorescence emissions which are received by photomultipliers which provide signals to a detector. The detector uses a ratioing technique to determine the concentration of .sup.129 I.sub.2 in the sample gas chamber.
REFERENCES:
patent: 3826920 (1974-07-01), Woodroffe et al.
patent: 3829696 (1974-08-01), Birnbaum
patent: 3967120 (1976-06-01), Ashe et al.
patent: 3982129 (1976-09-01), Lattin et al.
"Laser-Induced Fluorescence in a Molecular Beam of Iodine" Ezekiel et al; ysical Review Letters; vol. 20, #3; Jan. 15, 1968; pp. 91 & 92.
Baronavski Andrew P.
McDonald Jimmie R.
McGraw Vincent P.
Rasmussen David G.
Schneider Philip
Sciascia R. S.
The United States of America as represented by the Secretary of
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