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K-shell fluorescence yields of medium and heavy elements using a simple method

✍ Scribed by L. D. Horakeri; B. Hanumaiah; S. R. Thontadarya

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
188 KB
Volume
27
Category
Article
ISSN
0049-8246

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✦ Synopsis

K-shell Ñuorescence yields, of medium and heavy elements in the atomic number range 62 O Z O 83 at x K , incident photon energies of 123.6 and 320 keV were measured by adopting the simple method proposed earlier, using an NaI(Tl) detector coupled to an active Ðlter ampliÐer and a 1K multi-channel analyser. The intensities were measured by placing the source and the target right on the face of the detector and by employing very weak radioactive sources (57Co and 51Cr) of the order of 104 Bq. Measured values were compared with the recent standard Ðtted values of Hubbell et al., and were found to be in close agreement. The values of bismuth, gold, x K tungsten, gadolinium and samarium were measured for the Ðrst time.

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