Experimental calculations of number, energy and dose albedos for various materials using 662 keV gamma rays
| Autor: | Inderjeet Singh, B.S. Sandhu, Arvind D. Sabharwal, Bhajan Singh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Nuclear and High Energy Physics Radiation Photon Physics::Instrumentation and Detectors 010308 nuclear & particles physics Scattering Radioactive source Detector Gamma ray 02 engineering and technology Scintillator 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Computational physics 0103 physical sciences General Materials Science Atomic number 0210 nano-technology Absorption (electromagnetic radiation) |
| Zdroj: | Radiation Effects and Defects in Solids. 173:944-955 |
| ISSN: | 1029-4953 1042-0150 |
| DOI: | 10.1080/10420150.2018.1513000 |
| Popis: | Number, energy and dose albedos are measured at a scattering angle of 180° for a broad beam of 662 keV gamma rays obtained from a radioactive source of 137Cs (having strength in µCi; 1 Ci = 3.7 × 1010 disintegrations per second). The gamma beam is incident on semi-infinite thick targets of variable atomic numbers. The scattering media is divided into three sets, which are pure elements, alloys and composite materials. Experiments are carried out using a 3″ × 3″ NaI(Tl) scintillation detector. To obtain precision in data, the response unfolding of a scintillation detector is used, which converts the observed pulse-height distribution to a true photon spectrum over the energy range of 2.5 to 640 keV. The detector response unfolding results in the true intensity of back-scattered gamma flux by shifting the events resulting from partial absorption of photons to the full energy peak of the spectrum. In the present study, albedo factors are studied as a function of target thickness and their atomic numb... |
| Databáze: | OpenAIRE |
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