Fluorescence Yields of theandShells in Heavy Elements
- 20 January 1964
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 133 (2A) , A381-A384
- https://doi.org/10.1103/physrev.133.a381
Abstract
A method has been developed to measure the fluorescence yields of the subshells in many heavy elements. This method is closely related to the to x-ray coincidence measurements used to determine , the partial shell yield following x-ray emission. The fluorescence yield is a linear combination of and , the fluorescence yields of the and subshells. The scintillation counters used to perform the coincidence experiments cannot separate the two components ( and ) of the x rays, and thus the experiment determines only the average fluorescence yield . There are a number of elements possessing absorption edges between the and x rays of the target materials. By using one of these elements as a secondary radiator, it is possible to eliminate all pulses in the x-ray counter due to x rays. The only target x rays contributing to the coincidence rate are the x rays which are caused by transitions. The observed coincidence rate is therefore proportional to . Values of can then be computed using previous measurements of .
Keywords
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