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Method for the Determination of K Shell Fluorescence Yields

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

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
245 KB
Volume
26
Category
Article
ISSN
0049-8246

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✦ Synopsis

A simple method is proposed for determining the K shell Ñuorescence yield, using an NaI(Tl) detector coupled x K , to an active Ðlter ampliÐer and a 1K multi-channel analyser. By placing the target and the source right on the face of the detector, that is, by forming a 2p geometrical conÐguration, the intensities are measured by employing weak radioactive sources of strengths of the order of 104 Bq. The target criterion is suggested following Bambynek et al.Ïs prescription for optimization of target thickness. The values were determined using several trials for each x K target to demonstrate the reliability and reproducibility of the method. The values were obtained for lead, x K tantalum and gold elemental targets, and also for lead compounds and for some rare earth compounds. These values were compared with the recent standard Ðtted values of Hubbell et al. and were found to be in close agreement. The method is discussed in detail.

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