Experimental evaluation of effective atomic number of composite materials using back-scattering of gamma photons
| Autor: | Arvind D. Sabharwal, Inderjeet Singh, Bhajan Singh, B.S. Sandhu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Radiation Photon Physics::Instrumentation and Detectors 010308 nuclear & particles physics Scattering Radioactive source Scintillator Condensed Matter Physics 01 natural sciences 0103 physical sciences General Materials Science Atomic physics Composite material 010306 general physics Saturation (magnetic) Effective atomic number |
| Zdroj: | Radiation Effects and Defects in Solids. 172:204-215 |
| ISSN: | 1029-4953 1042-0150 |
| DOI: | 10.1080/10420150.2017.1286658 |
| Popis: | A method has been presented for calculation of effective atomic number (Zeff) of composite materials, by using back-scattering of 662 keV gamma photons obtained from a 137Cs mono-energetic radioactive source. The present technique is a non-destructive approach, and is employed to evaluate Zeff of different composite materials, by interacting gamma photons with semi-infinite material in a back-scattering geometry, using a 3″ × 3″ NaI(Tl) scintillation detector. The present work is undertaken to study the effect of target thickness on intensity distribution of gamma photons which are multiply back-scattered from targets (pure elements) and composites (mixtures of different elements). The intensity of multiply back-scattered events increases with increasing target thickness and finally saturates. The saturation thickness for multiply back-scattered events is used to assign a number (Zeff) for multi-element materials. Response function of the 3″ × 3″ NaI(Tl) scintillation detector is applied on observ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |