A non-destructive technique for assigning effective atomic number to scientific samples by scattering of 59.54 keV gamma photons
✍ Scribed by M.P. Singh; Amandeep Sharma; Bhajan Singh; B.S. Sandhu
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 225 KB
- Volume
- 619
- Category
- Article
- ISSN
- 0168-9002
No coin nor oath required. For personal study only.
✦ Synopsis
The objective of present experiment, employing a scattering of 59.54 keV gamma photons, is to assign effective atomic number (Z eff ) to scientific samples (rare earths) of known composition. An HPGe semiconductor detector, placed at 901 to the incident beam, detects gamma photons scattered from the sample under investigation. The experiment is performed on various elements with atomic number satisfying, 6 r Zr 82, for 59.54 keV incident photons. The intensity ratio of Rayleigh to Compton scattered peaks, corrected for photo-peak efficiency of gamma detector and absorption of photons in the sample and air, is plotted as a function of atomic number and constituted a best fit-curve. From this fit-curve, the respective effective atomic numbers to samples of rare earths are determined. The agreement of measured values of Z eff with theoretical calculations is quite satisfactory.