Measurement of the energy resolution of a scintillating fiber detector

Cheri Hudson; Roy C. Chaney; Ervin J. Fenyves; H. Hammack; Peter P. Antich

doi:10.1117/12.185819

7 September 1994 Measurement of the energy resolution of a scintillating fiber detector

Cheri Hudson, Roy C. Chaney, Ervin J. Fenyves, H. Hammack, Peter P. Antich

Proceedings Volume 2281, Scintillating Fiber Technology and Applications II; (1994) https://doi.org/10.1117/12.185819
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

The energy resolution is measured for a plastic scintillating fiber detector coupled to position sensitive photomultiplier tubes. A point source (Mn-54) is placed at a distance in front of an xy plastic scintillating fiber stack which is coupled to two Hamamatsu R2486 position sensitive photomultiplier tubes. At some distance behind this detector another plastic scintillating detector coupled to another position sensitive photomultiplier is placed. Gamma rays interacting in the first detector are scattered, and interact with the second detector. By the knowledge of the source location, the Compton interaction location in the first detector, and the interaction location of the scattered gamma in detector two, the scattering angle of the Compton interaction in detector one can be determined. From this scattering angle and the known primary gamma energy the Compton electron energy can be calculated. The energy resolution of the scintillating fiber stack-photomultiplier unit of detector one for different Compton electron energies is determined by plotting the experimentally measured electron energies obtained from the light output of the photomultiplier tubes of detector one, comparing them with the electron energy calculated above, and expressed in terms of the FWHM.

Citation Download Citation

Cheri Hudson, Roy C. Chaney, Ervin J. Fenyves, H. Hammack, and Peter P. Antich "Measurement of the energy resolution of a scintillating fiber detector", Proc. SPIE 2281, Scintillating Fiber Technology and Applications II, (7 September 1994); https://doi.org/10.1117/12.185819

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