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Gas-chromatographic technique for rapid isolation of uranium fission products

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Summary

A gas-chromatographic technique for a rapid separation of fission iodine or bromine from the other elements formed in nuclear fission was developed. Recoil-formed, volatile methyl bromide and methyl iodide were isolated within 1 min after the end of irradiation. An extension of this technique to other elements and to other nuclear reactions should be possible.

The γ-ray spectra of both halogen fractions were measured. A dominating γ-ray at 0.79 MeV and a weaker γ-ray at 0.51 MeV were assigned to 88Br (half life 16 sec). No γ-ray could be unambiguously attributed to 137I (24 sec), a fact which makes unlikely the presence of highly intensive peaks in the γ-ray spectrum of this isotope. Further details of the spectra are discussed.

Zusammenfassung

Eine gaschromatographische Methode zur schnellen Isolierung von Spaltjod oder Spaltbrom aus dem Gemisch der bei der Kernspaltung entstehenden Elemente wurde entwickelt. Mittels Spaltrückstoß gebildetes, flüchtiges Methylbromid oder Methyljodid wurde innerhalb 1 min nach Bestrahlungsende isoliert. Die Methode sollte auf andere Elemente und andere Kernreaktionen übertragbar sein.

γ-Spektren der beiden Halogenfraktionen wurden gemessen und ergaben für 88Br (Halbwertszeit 16 sec) eine dominierende Linie bei 0,79 MeV und eine schwache Linie bei 0,51 MeV. In der Jodfraktion wurde keine γ-Linie beobachtet, die man eindeutig 137J (24 sec) hätte zuordnen können, was sehr intensive Peaks im Spektrum dieses Isotops unwahrscheinlich macht. Weitere Einzelheiten der Spektren werden diskutiert.

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Dedicated to Prof. Dr. F. Strassmann on his 65th birthday.

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Denschlag, H.O., Gordus, A.A. Gas-chromatographic technique for rapid isolation of uranium fission products. Z. Anal. Chem. 226, 62–71 (1967). https://doi.org/10.1007/BF00500584

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  • DOI: https://doi.org/10.1007/BF00500584

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