An MCNP Feasibility Study for a Switchable Radioactive Gamma Source for SPECT Gamma Camera Calibration or Blood Irradiation

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Dranga, Ruxandra Ioana




Gamma radiation sources are used for a multitude of applications, including nuclear medicine applications. The current study investigated the feasibility of a switchable radioactive gamma source for two applications: as a calibration source for SPECT gamma cameras; and as a blood irradiator. The source was based on a sequence of (α, n) reactions followed by (n, γ) reactions. MCNP5 parametric studies were performed to investigate the effects of different moderators (e.g., heavy water, deuterated polyethylene or high density polyethylene), neutron absorbers (e.g., Sm(natural) or Gd(natural)) and geometries, on the calculated gamma flux and dose rate for the proposed source design. The results show that, although technically feasible, the applicability of the proposed source for the two intended applications is not feasible because of cost constraints for larger source designs, and low gamma fluxes and dose rates obtained for smaller source designs.


Biophysics - Medical




Carleton University

Thesis Degree Name: 

Master of Applied Science: 

Thesis Degree Level: 


Thesis Degree Discipline: 

Engineering, Biomedical

Parent Collection: 

Theses and Dissertations

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