Ratio of LK X-Ray Intensities in Thallium-204 Decay

Details Ratio of LK X-Ray Intensities in Thallium-204 Decay Ratio of LK X-Ray Intensities in Thallium-204 Decay

Aug 1957

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1957phrv..107.1062s&link_type=abstract

Physical Review, vol. 107, Issue 4, pp. 1062-1064

Physics

5

Scientific paper

The ratio of L and K x-rays of mercury resulting from orbital-electron capture in high-specific-activity sources of 4-year Tl204 has been measured with a gas proportional counter and NaI(Tl) scintillation spectrometer. The intensity ratio was found to be ILIK=0.46+/-0.04. If one accepts a value of 0.524 for the LK electron capture ratio from the theoretical results of Brysk and Rose, the mean L-fluorescence yield of mercury becomes ω¯L=0.34+/-0.04. A study was made of the possible effect of fluorescent x-ray excitation owing to the noncarrier-free nature of the source; among sources of equal radioactive strength ranging in superficial density from 0.54 to 2.21 mg/cm2 in inert thallium nitrate solids, no appreciable change in the x-ray intensities was detected.

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