Study of Compton suppression capability in a triple-layer phoswich detector Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/wm117s11v

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  • A triple layer phoswich detector was designed and assembled in the advanced radiation instrumentation lab at Oregon State University. The detector had three scintillation layers: the first one was a BC-400 for beta and conversion electron detection, the second layer was a CsI(Tl) for x-ray and gamma detection, and the third layer was BGO for shielding the CsI(Tl) crystal from background radiation and identifying scattered photons from the CsI(Tl) layer. Digital pulse processing was utilized to analyze pulses at a 200 MHz sampling rate. Pulses were analyzed according to their light decay time. The detector was able to suppress Compton events in low energy spectrum through pulse shape analysis. Suppression factors were calculated at the 90 keV and 250 keV regions in the ¹³⁷Cs gamma ray spectrum. Compton suppression capability reduced the Compton continuum at 90 keV region, and at 250 keV region by a factor of 56.5%, and 68.3%, respectively.
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  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2011-08-24T17:52:28Z (GMT) No. of bitstreams: 1 AlhawsawiAbdulsalamM2011.pdf: 14558573 bytes, checksum: fc689fae86e85eddbd3ce6de93c81206 (MD5)
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