Dysprosium factors

The standard cadmium ratio technique wais used for the measurement of p , the ratio of epi- to subcadmium captures in Th. The 27.4-day half-life Pa produced in ThO, wafers was y counted. The differential technique was used to determine lny> dysprosium thermal disadvantage factor. Dysprosium aluminum foils 1.19-mm diam x 0.127-mm thick were distributed throughout a unit cell. 

Measurements were made of (dysprosium disadvantage factor), poz (ratio of epi- to subcadmium capture ratio in Th), and 6 (ratio of fission in Th to fission in U). The techniques used in measuring C and p were reported elsewhere and will not be reported here. Of more interest is a new technique of measuring the fSst fission ratio. 

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